Adolfas Mekas (September 30, 1925 – May 31, 2011) was a Lithuanian-born film director, and brother of Jonas Mekas. He is principally known for his work in the United States.
Prior to World War II, Adolfas and Jonas Mekas had set up a theatre. Later, in a camp for displaced persons, they studied with a teacher of the Stanislavsky System. The brothers emigrated to the United States in 1949. They studied with Hans Richter before establishing Film Culture magazine in 1955.