Margus Vaher (born September 19, 1950 in Kohtla-Järve) is an Estonian actor.

He graduated in 1974 from the Department of Performing Arts of the Tallinn State Conservatory (6th flight). From that same year, he started working at the Ugala theater in Viljandi.

Margus Vaher's father, Eugen Vaher, was the leader of Jõhvi's recreational theater troupe, and his nephew is Tanel Jonas. His son is Berk Vaher.