Margus Oopkaup (born March 11, 1959) is an Estonian stage, film and television actor and playwright who was engaged at the Endla Theatre from 1982 to 2000. In 1983, he was awarded the Best Young Actor award for his performance in the film Nipernaadi.

Margus Oopkaup was born in Kuressaare on the island of Saaremaa. His father was a school teacher and his mother was a medical professional.[2] He graduated from secondary school in Kuressare in 1977 and studied at the Tallinn State Conservatory (now, the Estonian Academy of Music and Theatre) from 1978 until 1982 under instruction from Aarne Üksküla. Among his graduating classmates were Anu Lamp, Jaan Rekkor, Laine Mägi, Sulev Teppart, Andrus Vaarik, and Viire Valdma. He also studied psychology at the University of Tartu from 1985 until 1989.