Nicholas I of Mecklenburg

Nicholas I, Lord of Mecklenburg (died 25 May 1200), was a son of Wertislaw, Obotrite prince of Rostock, and governed Mecklenburg from 1178. Between 1183 and 1185 he warred against his cousin Henry Borwin I with Danish backing; in 1185 both cousins had to acknowledge King Canute VI of Denmark as their liege lord, who enfeoffed Nicholas with Rostock. He also campaigned with the Danes and Emperor Frederick I against Henry the Lion.

At Waschow in May 1200 the Mecklenburgers defeated Count Adolf III of Holstein, securing southwestern Mecklenburg, but Nicholas fell in the battle.