Máel Mórda mac Murchada (died 23 April 1014) was King of Leinster.

Son of Murchad mac Finn and brother of Gormflaith, he belonged to the Uí Fáeláin sept of the Uí Dúnlainge, whose lands lay around Naas on the middle reaches of the River Liffey, in modern County Kildare.

Máel Mórda is best known as an enemy of Brian Boru, they fought at the Battle of Glenmama on 30 December 999 and both men died in the Battle of Clontarf, fought on Good Friday in 1014. Máel Mórda's son Bran was King of Leinster from 1016 until he was deposed in 1018. Thereafter, perhaps as a result of the heavy losses at Clontarf, the kingship of the Uí Dúnlainge was held by the Uí Muiredaig sept.