Calvert County is a county located in the U.S. state of Maryland . As of the 2010 census , the population was 88,737.  Its county seat is Prince Frederick .  The county's name is derived from the family name of the Barons of Baltimore , the proprietors of the English Colony of Maryland.
Calvert County is included in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area . It occupies the Calvert Peninsula , which is bordered on the east by Chesapeake Bay and on the west by the Patuxent River .
Calvert County is part of the Southern Maryland region. The county has one of the highest median household incomes in the United States.
First settled as part of Charles County (much larger than the present-day Charles County ) around 1650, it was renamed. Patuxent County was established in 1654 by an Order in Council. In 1658 the county was renamed Calvert County. It is one of the older counties in Maryland, after St. Mary's County, Kent County and Anne Arundel County .
Once made up primarily of farms and tobacco fields, the county has become a fast-growing exurban neighbor of Washington. Many home prices have nearly quadrupled in the past decade, with many four-bedroom homes in the northern half of the county averaging over $1,000,000. The popular weekend resort towns of Solomons , Chesapeake Beach , and North Beach are notable.
Law and government
Calvert County is governed by a group of five county commissioners, the traditional form of county government in the State of Maryland.
|President||Steven R. Weems||Republican||At Large|
|Vice President||Evan K. Slaughenhoupt Jr.||Republican||3|
According to the U.S. Census Bureau , the county has a total area of 345 square miles (890 km 2 ), of which 213 square miles (550 km 2 ) is land and 132 square miles (340 km 2 ) (38%) is water.  It is the smallest county in Maryland by land area and third-smallest by total area.
Calvert County lies in the humid subtropical climate zone, with hot, humid summers and mild to chilly winters with plentiful precipitation year-round. Its proximity to the Chesapeake Bay has a moderating effect on temperatures compared with locales further inland.
- Anne Arundel County (north)
- Prince George's County (northwest)
- Charles County (west)
- Dorchester County (east)
- Talbot County (east)
- St. Mary's County (south)
| U.S. Decennial Census  |
1790-1960 1900-1990 
1990-2000  2010-2015 
As of the census of 2000, there were 74,563 people, 25,447 households, and 20,154 families residing in the county. The population density was 346 people per square mile (134/km²). There were 27,576 housing units at an average density of 128 per square mile (49/km²). The racial makeup of the county was 83.93% White , 13.11% Black or African American , 0.30% Native American , 0.88% Asian , 0.03% Pacific Islander , 0.49% from other races , and 1.27% from two or more races. 1.52% of the population were Hispanic or Latino of any race. 15.5% were of Irish , 15.0% German , 12.0% English , 11.5% United States or American and 7.1% Italian ancestry.
There were 25,447 households out of which 41.70% had children under the age of 18 living with them, 64.80% were married couples living together, 9.90% had a female householder with no husband present, and 20.80% were non-families. 16.30% of all households were made up of individuals and 5.70% had someone living alone who was 65 years of age or older. The average household size was 2.91 and the average family size was 3.26.
In the county the population was spread out with 29.60% under the age of 18, 6.40% from 18 to 24, 31.70% from 25 to 44, 23.40% from 45 to 64, and 8.90% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 97.30 males. For every 100 females age 18 and over, there were 94.00 males.
The median income for a household in the county was $65,945, and the median income for a family was $71,545 (these figures had risen to $88,989 and $100,229 respectively as of a 2007 estimate  ). Males had a median income of $48,664 versus $32,265 for females. The per capita income for the county was $25,410. About 3.10% of families and 4.40% of the population were below the poverty line , including 5.10% of those under age 18 and 5.70% of those age 65 or over.
According to the 2010 Census the racial and ethnic make-up of the Calvert County Population was 79.65% Non-Hispanic whites, 13.44% blacks, 0.37% Native Americans, 1.42% Asians, 0.05% Pacific Islanders, 0.12% Non-Hispanics reporting some other race, 2.40% Non-Hispanics reporting multiple races and 2.75% Hispanic.
As of the 2010 United States Census , there were 88,737 people, 30,873 households, and 23,732 families residing in the county.  The population density was 416.3 inhabitants per square mile (160.7/km 2 ). There were 33,780 housing units at an average density of 158.5 per square mile (61.2/km 2 ).  The racial makeup of the county was 81.4% white, 13.4% black or African American, 1.4% Asian, 0.4% American Indian, 0.7% from other races, and 2.7% from two or more races. Those of Hispanic or Latino origin made up 2.7% of the population.  In terms of ancestry, 19.6% were German , 17.6% were Irish , 13.9% were English , 8.4% were Italian , and 7.4% were American . 
Of the 30,873 households, 40.4% had children under the age of 18 living with them, 60.6% were married couples living together, 11.3% had a female householder with no husband present, 23.1% were non-families, and 18.1% of all households were made up of individuals. The average household size was 2.85 and the average family size was 3.23. The median age was 40.1 years. 
The median income for a household in the county was $90,838 and the median income for a family was $102,638. Males had a median income of $66,909 versus $49,337 for females. The per capita income for the county was $36,323. About 2.8% of families and 4.4% of the population were below the poverty line , including 5.3% of those under age 18 and 5.3% of those age 65 or over. 
The Chesapeake Biological Laboratory , part of the University of Maryland Center for Environmental Science is located in Solomons .
According to the County's 2009 Comprehensive Annual Financial Report,  the top employers in the city are:
|#||Employer||# of Employees|
|1||Calvert County Public Schools||2,264|
|2||Calvert County Government||1,257|
|3||Calvert Memorial Hospital||1,057|
|6||Arc of Southern Maryland||455|
|9||Chesapeake Beach Resort & Spa||230|
Calvert County is served by Calvert County Public Schools . The county's education system consists of 13 elementary schools, six middle schools, four high schools, vocational education center, and a variety of other facilities.
The main artery serving Calvert County is Maryland Route 4 (which begins in Washington, D.C. as Pennsylvania Avenue before crossing into Prince George's County, Maryland and Anne Arundel County, Maryland ). Route 4 in Calvert County begins at the very northern tip of the county at Lyons Creek, approximately 3 miles north of Dunkirk . At Sunderland , Route 4 meets Maryland Route 2 (traveling south as a two-lane road from Annapolis ) and the two roads merge as Maryland Route 2-4. Route 2-4 continues south through Prince Frederick , St. Leonard and Lusby . At Solomons , Routes 2 and 4 split again, with Route 2 heading towards downtown Solomons and Route 4 crossing the Patuxent River at the Governor Thomas Johnson Bridge into St. Mary's County .
Route 2-4 is designated Solomons Island Road throughout much of the county, with the section south of Prince Frederick being recently renamed Louis Goldstein Highway in memory of Louis L. Goldstein , the former comptroller of Maryland and Calvert County resident.
In the 1970s and 1980s, Route 2-4 underwent an extensive expansion project, with the formerly two-lane road becoming a four-lane dual highway. Certain portions of the highway were re-aligned, with the former roadway becoming Maryland Route 765 . The final portion of the dualized Route 2-4 between St. Leonard and Solomons was completed in 1988. In 2009, a portion of Route 2-4 in Prince Frederick was expanded to 3 lines, along with sidewalks added.
Other major roadways in Calvert County include:
- Maryland Route 231 , which travels west from Prince Frederick to the Patuxent River , ultimately crossing the river at the Benedict Bridge into Charles County .
- Maryland Route 260 , which starts at an overpass interchange at the Calvert-Anne Arundel border and travels southeast to Chesapeake Beach . A portion of Route 260 is a four-lane dual highway.
The Census Bureau recognizes the following census-designated places in the county:
Dunkirk , Huntingtown , Lusby , Owings , Prince Frederick , St. Leonard and Solomons have all been designated by Calvert County government as being "town centers". The "town center" designation means while these communities may not have incorporated central governments, they do have specified boundaries surrounding the central business and residential areas for zoning purposes. The reason behind the "town center" designation is to cluster new development within established areas with existing infrastructure, thus discouraging urban sprawl . The implementation of the "town center" concept in Calvert County over the past two decades has for the most part been successful in preserving rural and agricultural areas outside the designated "town centers", and stands as a key example of the smart growth planning strategy.  
- Louisa Adams , First Lady of the United States , wife of President John Quincy Adams
- Harriet Elizabeth Brown , Calvert County school teacher, catalyst in education in Maryland and throughout the US for equal pay
- Judith Catchpole , an indentured servant who in 1656 was tried and acquitted of murdering her unborn child by one of the earliest all-female juries in the United States
- Brett Cecil , professional baseball player for the Toronto Blue Jays
- Cupid Childs , professional baseball player
- Tom Clancy , author
- Bernie Fowler , former Maryland State Senator and Patuxent River advocate
- Jon Franklin , two-time Pulitzer winner and author 
- Louis L. Goldstein , former Comptroller of Maryland
- Earl F. Hance , Secretary of the Maryland Department of Agriculture
- Doug Hill , WJLA-TV weatherman
- Al Hunt , Bloomberg News executive editor
- Thomas Johnson , first elected governor of Maryland , Continental Congress delegate, Associate Justice of the Supreme Court of the United States
- Joseph Kent , U.S. senator , governor of Maryland
- Cliff Kincaid , investigative journalist with Accuracy in Media and American Survival, Inc.
- Robert McClain , pro football player for the Atlanta Falcons
- Thomas V. Miller, Jr. , Maryland Senate president
- Augustus Rhodes Sollers , congressman
- Arthur Storer , first astronomer in the American colonies , original namesake for Halley's Comet
- Roger Brooke Taney , Chief Justice of the United States , presided over the Dred Scott decision
- Margaret Taylor , First Lady of the United States , wife of President Zachary Taylor
- Robert Ulanowicz , theoretical ecologist
- Michael Willis , actor
- Judy Woodruff , news anchor and journalist
In popular culture
Calvert County has been the setting for several movies and television programs. The opening scene of the 1993 Clint Eastwood movie In the Line of Fire was filmed at Flag Harbor Marina in St. Leonard . More recently, the Calvert County Sheriff's Department has been featured on several reality television programs, including Speeders on the truTV network and MTV's Busted .