A Justice of the peace (JP) is a judicial officer of a lower or puisne court, elected or appointed by means of a commission (letters patent) to keep the peace. In past centuries the term commissioner of the peace was often used with the same meaning. Depending on the jurisdiction, such justices dispense summary justice or merely deal with local administrative applications in common law jurisdictions. Justices of the peace are appointed or elected from the citizens of the jurisdiction in which they serve, and are (or were) usually not required to have any formal legal education in order to qualify for the office. Some jurisdictions have varying forms of training for JPs.

In 1195, Richard I ("the Lionheart") of England and his Minister Hubert Walter commissioned certain knights to preserve the peace in unruly areas. They were responsible to the King in ensuring that the law was upheld and preserving the "King's peace". Therefore, they were known as "keepers of the peace".^[1]

An act of 1327 had referred to "good and lawful men" to be appointed in every county in the land to "guard the peace"; such individuals were first referred to as conservators of the peace,^[2] or wardens of the peace. The title justice of the peace derives from 1361,^[3] in the reign of Edward III. The "peace" to be guarded is the sovereign's, the maintenance of which is the duty of the Crown under the royal prerogative. Justices of the peace still use the power conferred or re-conferred on them since 1361 to bind over unruly persons "to be of good behaviour". The bind over is not a punishment, but a preventive measure, intended to ensure that people thought likely to offend will not do so. The justices' alternative title of "magistrate" dates from the 16th century, although the word had been in use centuries earlier to describe some legal officials of Roman times.^[4]

In the centuries from the Tudor period until the onset of the Industrial Revolution, the JPs constituted a major element of the English (later British) governmental system, which had been termed sometimes squirearchy (i.e., dominance of the land-owning gentry). For example, historian Tim Blanning notes^[5] that while in Britain the royal prerogative was decisively curbed by the Bill of Rights 1689, in practice the central government in London had a greater ability to get its policies implemented in the rural outlying regions than could contemporary absolute monarchies such as France – a paradox due especially to JPs belonging to the same social class as the Members of Parliament and thus having a direct interest in getting laws actually enforced and implemented on the ground.

Being an unpaid office, undertaken voluntarily and sometimes more for the sake of renown or to confirm the justice's standing within the community, the justice was typically a member of the gentry. The justices of the peace conducted arraignments in all criminal cases, and tried misdemeanours and infractions of local ordinances and bylaws. Towns and boroughs with enough burdensome judicial business that could not find volunteers for the unpaid role of justice of the peace had to petition the Crown for authority to hire a paid stipendiary magistrate.

The Municipal Corporations Act 1835 stripped the power to appoint normal JPs from those municipal corporations that had it. This was replaced by the present system, where the Lord Chancellor nominates candidates with local advice, for appointment by the Crown.

Until the introduction of elected county councils in the 19th century, JPs, in quarter sessions, also administered the county at a local level. Their many roles included regulating wages and food supplies, managing roads, bridges, prisons and workhouses and undertook to provide and supervise locally those services mandated by the Crown and Parliament for the welfare of the county. To this end they set the County Rate, where one was set at all.

Women were not allowed to become JPs in the United Kingdom until 1919, the first woman being Ada Summers, the Mayor of Stalybridge, who was a JP (Ex officio) by virtue of her office. In October 1920 Ada was appointed a JP officially, alongside other pioneers like Miriam Lightowler OBE in Halifax.^[6] Emily Murphy of Edmonton, Canada, preceded her by some three and a half years.^[7][8] Now in the UK, 50% of JPs are women.

In special circumstances, a justice of the peace can be the highest governmental representative, so in fact 'gubernatorial', in a colonial entity. This was the case in the Tati Concessions Land, a gold-mining concession (territory) in the Matabele kingdom, until its annexation by the British Bechuanaland protectorate.

A justice of the peace in Australia is typically someone of good stature in the community who is authorised to witness and sign statutory declarations and affidavits and to certify copies of original documents. Criteria for appointment vary widely, depending on the state.

In the state of Queensland, a "justice of the peace (qualified)" has the additional powers to issue search warrants and arrest warrants and, in conjunction with another justice of the peace (qualified) constitute a magistrates' court for exercising powers to remand defendants in custody, grant bail, and adjourn court hearings.^[9][10][11]

Some justices are appointed as justice of the peace (magistrates' court), usually in remote aboriginal communities, to perform many of the functions that might otherwise fall to a stipendiary magistrate.

In Queensland, a lawyer may be appointed as a Justice of the Peace without further education or qualification and has the full powers of a JP (Magistrate's Court). A commissioner for declarations (C.dec) has powers limited to witnessing documents, witnessing statutory declarations, witnessing affidavits, witnessing and administering oaths and affirmations.^[9]

The first woman to become a JP in Queensland was Matilda (Maud) Hennessey of Mackay on 24 April 1918.^[12][13]

Justices of the peace and bail justices, who are also volunteers, are appointed to serve a semi-judicial function in all areas of the Victorian community. The main official roles in the Victorian community include witnessing statutory declarations, witnessing affidavits and hearing bail matters outside court hours (bail justices only).

The first woman to become a JP in Victoria was Mary Catherine Rogers who, in 1920, became the first woman councillor in Australia when she was elected in the City of Richmond.^[14]

Justices of the peace (JPs) provide a service to the community as independent witnesses of statutory declarations, powers of attorney and affidavits. JPs, who are also volunteers, are selected through an extensive interview, written exam and practical testing. They are recommended by the state attorney-general and appointed by the governor-in-council, and it is their job to authorise and witness statutory declarations and affidavits within the state of Victoria. There are currently around 4,800 JPs serving in all areas of the state.^[15]

The role of a bail justice is to hear bail applications (under the Bail Act 1977) and to hear applications for interim accommodation orders for children (under the Children and Young Persons Act 1989) within Victoria. Bail justices, once appointed, may remain in their role until they turn 70 years of age (although they must be under 65 at the time of their appointment). They are often required to attend call outs and rule on bail applications or protection applications for children in danger on weekends and late at night when the courts are closed, but they can also witness Victorian statutory declarations and affidavits. Candidates must successfully complete a three-day training course run by the Department of Justice. Bail justices, who are also volunteers, also have some limited powers under federal legislation, including the power to conduct interstate extradition hearings and extending question time for federal police. Bail Justices may use the post-nominals BJ after their names.^[16]

The most common functions performed by a justice of the peace in New South Wales are to witness the signing of a statutory declaration, witness the signing of an affidavit and certify that a copy of an original document is a true copy.^[17]

JPs are appointed by the Governor of New South Wales for five-year terms. They are volunteers, who come from all walks of life and all sections of the community. JPs are people who are trusted to be honest, careful and impartial when performing the functions of a JP. They must not charge a fee or accept a gift for providing JP services, tell people what to write in a statutory declaration or affidavit or write it for them or give them legal advice.^[17]

Ways to find a JP in New South Wales include:

1. Search the JP Public Register. The register lists all JPs for each postcode area and provides a telephone contact number for JPs who serve the community directly.
2. Check a public listing of scheduled JP services to find when JPs are available at scheduled times and locations across the state.^[18]

In South Australia, there are two types of justices: justice of the peace and special justices.

A justice of the peace (JP) in South Australia is typically someone of good stature in the community who is authorised to witness and sign statutory declarations, affidavits, waiver rights, search warrants, drug warrants, divorce documents, and to certify copies of original documents and to witness the signing of power of attorney and guardianship documents, providing the JP is satisfied with the capability of the signatory.

A Special Justice (SJ) is a higher level of justice of the peace in South Australia; they sit on the bench of the magistrates' court hearing cases in the petty sessions division.

The South Australian Attorney-General has set up a web site to locate justices of the peace.^[19] The majority of metropolitan and many regional Councils (Local Government authorities) have a rotational justice of the peace in residence at nominated times.

South Australia's first women justices were appointed in July 1915.^[20]

Justices of the peace in Western Australia are appointed by the Governor who authorises them to carry out a wide range of official administrative and judicial duties in the community.

As well as presiding in the Magistrates Court, justices of the peace are regularly called upon by the WA Police to sign search warrants and authorise the issuing of summonses. The administrative tasks include witnessing affidavits and documents such as wills and statutory declarations.

'Visiting justices' are a special group of justices of the peace, appointed to preside over cases within the prison system.^[21]

In Belgium, the justices of the peace (Dutch: vredegerecht, French: justice de paix, German: friedensgericht) function as the small claims courts in the country's judicial system; they stand at the bottom of the Belgian judicial hierarchy and only handle civil cases. There is a justice of the peace in each judicial canton of Belgium, of which there are 187 in total as of 2017. The justices of the peace have original jurisdiction over cases in which the disputed amount does not exceed 5,000 euro (as of September 2018), except for the matters over which another court or tribunal has exclusive jurisdiction. In addition, the justices of the peace have original jurisdiction over a number of matters irrespective of the disputed amount, such as cases involving the renting or leasing of real estate, evictions, easement, land consolidation, consumer credit or unpaid utility bills. The justices of the peace also have original jurisdiction in certain aspects of family law, most notably legal guardianships for incapacitated seniors, and the involuntary commitment of the mentally ill to psychiatric facilities. The judgments made by the justices of the peace can, with some exceptions, be appealed to the tribunals of first instance.^[22][23]

In Canada, justices of the peace play a role in the administration of justice at the provincial level. Justices are generally appointed by the lieutenant governors of Canada's provinces, and by the commissioners of Canada's territories, on the advice of their relevant premier or Attorney General. Canada made the first appointment in the then British Empire of a woman as a magistrate, namely Emily Murphy, who was sworn in as a police magistrate in the Women's Court of the City of Edmonton (Alberta) on 19 June 1916.

In British Columbia, pursuant to the Provincial Court Act, all judges are justices of the peace, and hence all of them are peace officers.

In the Northwest Territories, justices may hear summary conviction matters, municipal by-laws, and certain criminal matters.^[24] However, in more populated provinces justices usually preside over bail hearings and provincial offences courts. When not in a court session, a justice can perform other judicial functions, such as issuing search warrants.

In Ontario, justices perform a wide variety of duties related to criminal and regulatory law, at the federal, provincial and municipal levels. Ontario JP wear a green sash versus red worn by judges.^[25]

In Quebec, there are two type of justices of the peace, administrative justice of the peace and presiding justice of the peace.

Administrative justice of the peace are court officers appointed by the Minister of Justice, and perform duties such as receiving criminal informations and issuing warrants. Presiding justice of the peace are appointed by commission under the Great Seal, and can try some criminal matters and issue warrants. They are appointed from advocates of at least ten years' standing and serve full-time until the age of 70.

In Yukon, justices of the peace are lay officers of the court. They sit in the Justice of the Peace Court, which is part of the Territorial Court of Yukon.

In Hong Kong, the historical functions of justices of the peace have been replaced by full-time, legally qualified magistrates. Nowadays, justices of the peace are essentially titles of honour given by the Government to community leaders, and to certain officials while they are in their terms of offices. They have no judicial functions, and their main duties include visiting prisons, institutions for young offenders and drug addicts, psychiatric hospitals, remand homes, places of refuge, reception and detention centres,^[26] administering statutory declarations, and serving as members of advisory panels.

In India, justices of the peace do exist,^[27] but they no longer occupy a prominent post. One of the famous justices in India was Kavasji Jamshedji Petigara.

Maharaja Prabirendra Mohan Tagore son of Maharaja Sir Prodyut Kumar Tagore KCSI of Calcutta was designated Justice of the Peace in 1932. He played a great part in saving more than 200 Muslim lives during the infamous riots in 1947 during the partition of India, by sheltering the Muslims in the Calcutta locality and most importantly in his palace itself.

Justices of the peace existed in Ireland prior to 1922, sitting in a bench under the supervision of resident magistrates at petty sessions to try minor offences summarily, and with a county court judge (in his capacity of chairman of quarter sessions) and jury to try more serious offences at quarter sessions. In the Irish Free State the position was effectively abolished by the District Justices (Temporary Provisions) Act 1923^[28] and permanently abolished by the Courts of Justice Act 1924. Their judicial powers were replaced by full-time, salaried, legally qualified district justices (now called district judges) and their quasi-judicial powers by unpaid lay Peace Commissioners. Peace commissioners may sign statutory declarations, and may issue summons and search warrants to the Garda Síochána (Irish police).^[29] A Peace Commissioner cannot witness the signature of an Affidavit; that function is performed by a Commissioner for Oaths.

A justice of the peace (JP), according to the Ministry of Justice, is a person of unquestionable integrity who seeks to promote and protect the rights of the individual and helps to provide justice to persons in a particular community. Additionally, the JP serves as a justice in petty court sessions, attends juvenile court sessions, issues summonses, considers applications for bail, explains and signs legal documents, sits on licensing panels, and gives counsel/advice. Any Jamaican citizen that can speak and write English is eligible to become a JP. Any club/organisation/citizen can recommend someone to become JP for a community. JPs are chosen under the Governor-General's discretion.

In Malaysia, justices of the peace have largely been replaced in magistrates' courts by legally qualified (first-class) stipendiary magistrates. However, state governments continue to appoint justices of the peace as honours. In 2004, some associations of justices of the peace pressed the federal government to allow justices of the peace to sit as second-class magistrates in order to reduce the backlog of cases in the courts.

A Justice of the Peace in New Zealand is someone of good stature in the community who is authorized to witness and sign statutory declarations and affidavits as well as certify documents. They may also perform citizenship ceremonies and act as a Visiting Justice in prisons the function of which is to record a prisoner's grievance and decide on its validity.

They have certain powers to issue search warrants, and (in conjunction with another justice of the peace) may try minor criminal trials in the district court and exercise powers to remand defendants in custody, grant bail, and adjourn court hearings. They are nominated for office by local Members of Parliament and appointed by the Governor-General. Appointment is for life and a JP must take the Oath of Allegiance and the Judicial Oath.

Sections 22, 22-A and 22-B of the Code of Criminal Procedure Code, 1898 provide for the appointment of justices of the peace by the provincial governments, their powers and duties respectively. However, seldom are justices of the peace appointed in Pakistan outside the judiciary. Session and additional session judges act as ex-officio justices of the peace as per Section 25 of the Code of Criminal Procedure, 1898. An Ex-officio Justice of the Peace may issue appropriate directions to the police authorities concerned on a complaint regarding- (i) non-registration of a criminal case; (ii) transfer of investigation from one police officer to another; and (iii) neglect, failure or excess committed by a police authority in relation to its functions and duties. Such functions being quasi-judicial in nature could not be termed as executive, administrative or ministerial.(PLD 2016 Supreme Court 581)

It is pertinent to note however, as many academics have pointed out, that there is great utility in the appointment of such justices especially in rural areas where enmity between rival groups can lead to the inability of registration of cognizable offences and biased judicial proceedings.

Justices of the peace in Singapore derives their powers from statute law. They are appointed by the President of the Republic of Singapore, under the provisions of section 11(l) of the Subordinate Courts Act (Cap.321). The President may revoke the appointment of any justice of the peace. Newly appointed justices of the peace is required by section 17 of the Subordinate Courts Act, to take the oath of office and allegiance as set out in the schedule to the Subordinate Courts Act, before exercising the functions of their office.

In their role, JPs serve as visiting justices of Singapore prisons, mediators or referees in the subordinate courts. They may also solemnise marriages in the Registry of Marriages or perform the duties of the magistrate conferred on them by any written law.^[30]

In Sri Lanka, Justice of the Peace (JP) is an honorary post, with authorization to witness and sign statutory declarations and affidavits as well as certify documents. Persons appointed as a Justice of the Peace may use the post-nominal JP. Current appointments are made under the Judicature Act No 02 of 1978, by the Minister of Justice at his/her discretion by publishing a list in the Gazette and appointee taking oaths before a high court, district court judge or magistrate with registrar of the supreme court recording it. There are four types of appointments of Justice of the Peace;

Senior Attorney at laws are appointed as Justice of the Peace and Unofficial magistrates to preside in the absence of a sitting Magistrate.^[31]. Any citizen of Sri Lanka can apply to the Ministry of Justice giving his or her credentials to be appointed as a justice of the peace. However, the applicant should be one who has served the public and carries out social service and should be of good standing. These JPs would be appointed with legal authority in all parts of the island or limited to a judicial district. The President of Sri Lanka and his/her officers are ex officio justices of the peace. There about 100,000 JPs in the island.^[32]

The post was introduced in the island during the British colonial era by the Governor Frederick North in 1801 and was later reformed in 1871.^[32] Until 1938, appointments were made by the Governor, after which appointments were made by the Legal Secretary until 1947. After Ceylon gained its independence in 1948, appointments were made by the Governor General and the Minister of Justice. Justice of the Peace had the power to administer oaths and affirmations per the Courts Ordinance No. 1 on 1889 section 84 and they could formally appoint members of the public to act as special police officers in times of turmoil and riots. Since certain government officers were ex-officio justices of the peace, this allowed British colonial officers to appoint special police officers from the European planters in times of crisis such as the 1915 riots.^[33] The Village Councils Law (No. 6 of 1964) made the Chairman of the Village Council an ex officio justices of the peace for that village area.^[34]

In 2014, for the first time, Justices of the Peace were authorized in Tonga. JPs are appointed by the Crown, but the Lord Chief Justice regulates their duties and defines their powers. The first JPs were warranted with duties including granting bail; issuing search warrants and subpoenas; taking affidavits, declarations and oaths; and having the power to witness documents. Term of office is one year and officials can be reappointed. The initial 19 JPs appointed were: ‘Aisea Ta’ofi and Sione Hinakau of Niuatoputapu; ‘Inoke Tuaimei’api of Niuafo'ou; Siosiua Hausia from ʻEua; Sione Palu, Sione Fakahua, Me’ite Fukofuka and Kisione Taulani of Ha’apai; Salesi Kauvaka, Viliami Pasikala, Haniteli Fa’anunu, Meli Taufaeteau and Moleni Taufa from Vava’u; and Salote Fukofuka, ‘Amelia Helu, ‘Ofa Likiliki, Tevita Fakatou, Sioape Tu’iono and Semisi Tongia of Tongatapu.^[35]

A magistrates' court in England and Wales is composed of a bench of (usually three) JPs or magistrates, who dispense summary justice: that is, they decide on offences which carry up to six months in prison, to a maximum of one year of imprisonment over not less than two indictable offences, or an unlimited fine. They are advised on points of law and procedure by a legally qualified justices' clerk and their assistants. No formal qualifications are required but magistrates need intelligence, common sense, integrity and the capacity to act fairly. Membership is widely spread throughout the local area and drawn from all walks of life following a rigorous selection process. All magistrates are carefully trained before sitting and continue to receive training throughout their service. Magistrates are unpaid volunteers but they may receive allowances to cover travelling expenses and subsistence. Lay justices or magistrates must sit for a minimum of 26 sessions (half-days) per year, but some sit as much as a day a week, or possibly more. Magistrates can sit alone to hear issues such as warrant applications or many traffic offences under the new Single Justice Procedure.

In addition to the lay justices, there are a small number of district judges, formerly known as stipendiary magistrates. These are legally qualified members of the magistracy and will often hear cases alone. It is important to distinguish the district judge (magistrates' court) from the district judges who usually sit in the county court.

Magistrates' courts today can deal with minor offences (fines or imprisonment of up to six months for a single offence or 12 months for consecutive sentences, or both) and handle over 95% of the criminal cases in England and Wales and Northern Ireland.^[36] With more serious offences, magistrates are responsible for indictment and committal to the Crown Court (a task in former times dealt with by a grand jury). Magistrates also have a civil jurisdiction, such as a family jurisdiction, or appeals against decisions of government departments. Although they had a licensing jurisdiction dealing liquor, betting and clubs licensing applications, this was transferred under the Licensing Act 2003 to local authorities. The magistrates now act in licensing matters only as an appeal court from the decisions of the local authority.

Cardiff Magistrates' Court is the only court in the country which deals with offences under the Companies Act, such as for late filing of accounts or directors' offences. Westminster Magistrates' Court has special responsibilities for dealing with all terrorism and extradition offences throughout the UK.^[37]

Until the Courts Act 2003 came into force, magistrates were tied to a particular area (see magistrates' courts committee, commission area, petty sessions area). This has now been changed such that they are assigned to local justice areas, but less strongly.

The Courts Act provides the current framework for appointment of the justices, which is done by the Lord Chancellor in the name of sovereign. Justices can also be removed by the same mechanism. District judges (magistrates' court) – previously known as stipendiary magistrates – must have a seven years' general legal qualification, and are appointed by the sovereign on the advice of the Lord Chancellor.

Before 1714, magistrates were liable to be approached at any time and in any place by people legally recognised as paupers, appealing for aid if parish authorities refused to provide any. It was relatively common for these magistrates to write out, on the spot, an order requiring aid to be granted.^[38]

Within the Scottish legal system justices of the peace are lay magistrates who currently sit in the justice of the peace courts. These courts were introduced in 2009 as a replacement for the district courts (established in 1975), which in turn replaced burgh police courts.^[39] Justices sit alone or in threes with a qualified legal assessor as convener or clerk of court. They handle many cases of breaches of the peace — drunkenness, minor assaults, petty theft, and offences under the Civic Government (Scotland) Act 1982.^[40]

The maximum sentencing power of a justice of the peace is 60 days imprisonment, or a fine up to £2,500, or both, and the ability to disqualify drivers.^[41]

In 2006, the Scottish Government announced its intention to unify the management of the sheriff and district courts in Scotland but retain lay justices, as part of its initiative to create a unified judiciary under the Lord President. Following the passage of the Criminal Proceedings etc. (Reform) (Scotland) Act 2007 the justice of the peace courts were implemented on a sheriffdom-by-sheriffdom basis.^{[42] []}

In Glasgow, the volume of business required the employment of three solicitors as "stipendiary magistrates" who sat in place of the lay justices. The stipendiary magistrates' court had the same sentencing power as the summary sheriff court in summary proceedings, which was the ability to sentence an offender to up to one year in prison or fine them up to £10,000. Stipendiary magistrates were replaced by summary sheriffs.^[43][44]

In Northern Ireland, the situation initially continued as it had in pre-1922 Ireland. However, justices of the peace no longer sat out of petty sessions after 1935 (Summary Jurisdiction and Criminal Justice Act (Northern Ireland) 1935).^[45] Since then, magistrates' courts in Northern Ireland have consisted of legally qualified resident magistrates (now known as district judges (magistrates' courts)) sitting alone, except in cases involving children, where two lay panelists sat with the magistrate. Justices of the peace were confined to the power to conduct committal hearings, bind persons over to the peace, sign warrants, summons, and other official documents. They were appointed by the Lord Chancellor on the recommendation of a committee in each county court division.

The Justice (Northern Ireland) Act 2002 introduced a new office of lay magistrate, to sit alongside resident magistrates at magistrates' courts in certain matters. Unlike in England and Wales, "lay magistrate" is the official title of the position, to distinguish from existing justices of the peace who do not sit in the magistrates' courts. The first lay magistrates were appointed in 2005. Two lay magistrates sit with the district judge (magistrates' court) in criminal proceedings involving children (replacing the former lay panelists) and Family Proceedings Court matters. The district judge (magistrates' court), who is a barrister or solicitor of at least seven years standing, presides over the bench.^[46] Most criminal justice functions of JPs were transferred to lay magistrates. It is expected that there will be no further appointments of justices of the peace in Northern Ireland, although those already appointed retain the title and any functions not transferred to lay magistrate under the 2002 Act.

In some US states, the justice of the peace is a judge of a court of limited jurisdiction, a magistrate, or a quasi-judicial official with certain statutory or common law magisterial powers.^[47] Some states have special qualifications or unique features for the office.

The justice of the peace typically presides over a court that hears misdemeanor cases, traffic violations, and other petty criminal infractions. The justice of the peace may also have authority over cases involving small debts, landlord and tenant disputes, or other small claims court proceedings. Proceedings before justices of the peace are often faster and less formal than the proceedings in other courts. In some jurisdictions a party convicted or found liable before a justice of the peace may have the right to a trial de novo before the judge of a higher court rather than an appeal strictly considered.

A justice of the peace also performs civil marriages.

A justice of the peace has the same jurisdiction as a municipal magistrate with respect to traffic and misdemeanor cases and restraining orders, though over cases whose affairs are not contained within the confines of a single municipality. Additionally, the Justice Court hears cases involving county ordinances (ordinances enacted by the board of supervisors that apply only to unincorporated areas), civil lawsuits up to a limit of $10,000, small claims cases up to $2,500, and issues evictions, called writs of restitution (after a forcible detainer or special detainer action (eviction) being successfully completed by a landlord). Justices of the peace, also called JPs, or Judges of the Justice Court, are elected in partisan elections for four-year terms from specific districts called precincts. They have the same authority and responsibility as all other judges in the state with respect to performing marriages, administrating oaths, adhering to the code of judicial conduct, and all aspects of justice administration. However, Arizona law does not require justices of the peace to be lawyers. Many justices of the peace are not legally trained, although all are required by the Arizona Supreme Court to complete a course at the Arizona Judicial College. As with JPs, municipal judges in Arizona are not required to be lawyers.

In Arkansas, a justice of the peace is an elected official equivalent to a county commissioner or county supervisor in some other states. Arkansas JPs sit on a county quorum court, composed of 9, 11, 13 or 15 JPs. The quorum court is a part-time body, elected from single-member districts, that has overall responsibility for county affairs. Among their responsibilities are passing the budget, creating new ordinances (at the misdemeanor level), setting property tax millage levels, and working with other elected officials. The full-time elected county administrator, who presides over the quorum court, is the county judge. Neither JPs nor the county judge have any judicial authority, though they do have the power to preside over civil marriages. Justices of the peace are elected every two years to these partisan offices.

Justices of the peace in Connecticut can preside over same-sex marriages. Unlike some states, Connecticut JPs are not penalized for refusing to perform such ceremonies.

Justices of the peace in Connecticut have the same general oath-giving powers as a notary public.

In Maine, the office of the Justice of the Peace was merged with Notary Public, a process that took place from 1981 to 1988.^[48] The duties that were attached to the office of Justice of the Peace were fully transferred to the Notary Public in 1988. The office currently named as "Justice of the Peace" in Maine is a court officer, an attorney, involved in the process of issuing warrants and responding to complaints.^[48]

Justices of the peace in the Commonwealth of Massachusetts are commissioned by the Governor with the advice and consent of the Council for seven-year terms. They are often called on to solemnize non-religious marriages, especially same-sex marriages, which certain religious officials are not willing to oversee.

Justices of the peace in Massachusetts have the same general oath-giving powers as a notary public, and are also empowered to issue certain writs.

In Minnesota, the office of the Justice of the Peace was abolished in 1977 (Minn. Stat. 487.35). It has not existed for 40-plus years although some people who offer private wedding officiant services erroneously claim to be Justices of the Peace, this term may not properly be used inasmuch as the office has been abolished. Under Minnesota law, however, judges, retired judges, court administrators, retired court administrators,and other public officials designated in statute may officiate or solemnize marriage ceremonies in addition to licensed or ordained ministers of any religious denomination who have filed their credentials with a county registrar (Minn, Stat. 517.04).

Justice courts are courts in New York State that handle traffic tickets, criminal matters, small claims and local code violations such as zoning. Though justice courts constitutionally are part of the New York State Unified Court System, state law generally makes justice courts independent of New York's Office of Court Administration (OCA) and instead makes Justice Courts the responsibility of their sponsoring localities. Town justice courts are often called Town Court, and village justice courts are often called Village Court. City courts in New York State handle mostly the same types of cases but are not justice courts.

The official title for judges in Justice Courts is Justice, the same as in New York Supreme Court. However, in common usage, most people, including lawyers, call them Judge. Justices in Justice Court do not have to be lawyers. The vast majority are not. Many of these courts are in small towns and villages where none of the residents are lawyers. In the larger towns, the justices are almost always lawyers.

While Justices and their court clerks receive training from OCA, there is tremendous variability in how cases are handled. This includes court procedures and substantive results. Some courts will dismiss a traffic ticket if the officer does not appear for a trial, while others will adjourn the matter to give the officer another chance. In some courts the police prosecute their own tickets, while in others an Assistant District Attorney from the county or a town or village attorney will prosecute the tickets. This may even vary by the type of officer, with State Troopers and Deputies prosecuting their tickets and a town attorney prosecuting tickets written by the town police.

Larger towns can have very busy caseloads, including several sessions a week with dozens of cases at each session, and people may have to wait hours before their cases are heard. In some small towns the caseload is extremely light, and a court might meet once a month and have only a few cases.

All criminal prosecutions that occur in towns and villages are commenced in a justice court. Misdemeanors are handled exclusively in the justice court, while felonies generally move up to County Court before the case moves forward.

Similar matters in some places outside New York are handled by a justice of the peace.

Town and village Justices also possess limited powers of a New York notary public, ex-officio, only within the county in which the town or village for which they serve is located; they may administer oaths and affirmations and take acknowledgments and proofs of execution. Some Justices seek and obtain a formal New York notary public commission to permit free travel statewide and enjoy the additional privileges and international legal recognition of a notary public.^[49]

New Hampshire justices of the peace are commissioned magisterial officers, appointed by the Governor and Executive Council to terms of five years, with the power to administer oaths, acknowledge instruments, perform marriage ceremonies^[50] and, effective 1 January 2008, solemnize civil unions for same-sex couples.^[51] They may also order compulsory mental examinations for good cause,^[52] act as a magisterial official regarding enforcement complaints on orders for isolation or quarantine issued by the Commissioner of Health and Human Services,^[53] administer oaths of office to public officials,^[54][55] take depositions^[56] and issue subpoenas.^[57][58] New Hampshire justices of the peace are also authorized, upon a showing of probable cause supported by affidavit, to issue arrest warrants,^[59][60] search warrants,^[61] administrative inspection warrants^[62] and by court appointment, to fix and receive bail in criminal cases.^[63][64][65]

Justices of the peace existed during the time of the Province of North Carolina (1712–1776. They were appointed by the colonial Governor and served in counties or districts. Justices were essential for conducting court business. After independence, the 1776 Constitution of North Carolina and an act passed by the North Carolina General Assembly of 1777 re-defined justices of peace in the State of North Carolina. Justices of the peace were authorized to marry and had other court duties and assisted in collecting taxes. Duties of the justices were further reduced after the 1868 North Carolina Constitution and inferior courts were abolished.^{[66][67] [68][69][70]}

In Texas, JP's are elected on a partisan ballot every four years.

Texas does not require a JP to be an attorney in good standing. However, JP's are required to be "well versed in the law" and take mandatory classes to retain their office. New JP's are required to take 80 hours of legal, state-mandated classes the first year, and 20 hours each year thereafter during their tenure in office.

Sections 18 and 19 of Article V of the Texas Constitution, as well as Chapters 27 and 28 of the Texas Government Code, outline the duties of these Courts and their officers.

Under Section 18, the number of JP's (and associated constables) is dependent on the size of the county:

Section 19 sets forth the minimum jurisdiction of the JP court:

JP cases are appealed to the county court level; the appeal results in a trial de novo. In criminal cases, cases beginning in justice court cannot be appealed beyond the county level court unless the fine is more than $100 or a constitutional matter is asserted.

In smaller counties without a coroner, the JP has the duty to perform inquests. The JP is also called out for any unattended deaths in the county.

A JP in a large precinct in a large county will work 5 days a week, 8 or more hours daily. Their duties will include, but are not necessarily limited to the following: Trials of civil matters, both to a 6-person jury and to the bench, with an amount in controversy not exceeding $10,000.00. Trials of criminal matters involving traffic violations and class C misdemeanors punishable by fine only. Pre-trial motion dockets and show cause hearings are held, and all discovery must be approved by the Judge in advance in civil cases. All criminal matters are controlled by the rules of criminal procedure and evidence. A much more restricted and smaller set of rules apply in civil matters unless in the Judges discretion, it is believed to be in the best interests of justice to apply the standard rules of evidence and procedure. The court has the exclusive jurisdiction of evictions. A Texas JP Judge will also magistrate prisoners and set bail. The Judge will hear juvenile violations such as truancy, and underage drinking and smoking. Warrants of Arrest, Alias, Search and Capias Profine are issued. Protective Orders can issue and result in jail time if violated. Several administrative matters are heard including the finding of a Dangerous Dog, Occupational Drivers License and tow hearings. Many writs are issued such as writs of re-entry to apartments, possession of realty and to reinstate utilities a landlord may have turned off. A JP has contempt power of $100 and up to 3 days in jail per occurrence. A JP is also authorized to perform marriage ceremonies.^[71]

Justices in Vermont are elected officials. They are elected by their towns but they are technically county officers. They also serve as election and poll officials, and on the boards of civil authority and tax abatement. They can perform civil marriages, administer oaths and have all the powers of a notary public.^[72]

In many states, the office of justice of the peace has been abolished or transferred to another court, such as the magistrate court.^[73] In larger cities, cases may be heard in a municipal court which has jurisdiction only within that city. Most efforts to abolish the office of justice of the peace have been led by the American Bar Association, which views non-lawyer judges as no longer necessary, as there are now far more persons with formal legal education than in the past when justices of the peace were first used.

California formerly had justice of the peace courts staffed by lay judges, but began phasing them out after a landmark 1974 decision in which the Supreme Court of California unanimously held that it was a violation of federal due process (under the Fourteenth Amendment to the U.S. Constitution) to allow a non-lawyer to preside over a criminal trial which could result in incarceration of the defendant.^[74] The court specifically recognized that in the aftermath of Gideon v. Wainwright (1963), it made no sense to allow a case to be tried before a layperson incapable of understanding the legal arguments of the attorney to whom the defendant was entitled under Gideon. The remaining justice courts (as well as municipal courts) were eliminated by the passage of Proposition 220 in June 1998, which merged all lower courts within the state judicial branch into the superior courts (the courts of general jurisdiction). Under current California law, all California judges must be licensed attorneys.

Notably, the Supreme Court of the United States sharply disagreed with California's analysis of the Fourteenth Amendment in the landmark case of North v. Russell, 427 U.S. 328 ^[79] (1976),^[75] in which the court held that Kentucky's use of nonlawyer judges in its police courts was not a violation of the Fourteenth Amendment guarantees of due process and equal protection of the laws.^[76]