General David Colyear, 1st Earl of Portmore KT, PC (c. 1656 – 2 January 1730) was a Scottish military officer and peer who served as the governor of Gibraltar from 1713 to 1720.

[1] Colyear was commissioned into the Army of William of Orange in 1674, becoming Lieutenant-General of the Scots Brigade, the three Scottish regiments which had been fighting in the service of the Netherlands for many decades.

In 1712, he served under the Duke of Ormonde in Flanders, and the same year he was named a member of the privy council and made a Knight of the Thistle.

[1] In August 1713, he was constituted governor of Gibraltar (gazetted November 1714[2]), and in October of the same year he was chosen one of the sixteen representative peers of Scotland.

When Gibraltar was besieged by the Spaniards in 1727, he embarked for that place to assume command, but on the approach of Admiral Wager with eleven ships the siege was raised.