Marcos Siega (born June 8, 1969 in New York City, New York) is a film, television, commercial, and music video director. He has also worked as a producer and a musician.

In the late 1980s he helped form the New York based punk band Bad Trip, releasing two full length records and numerous EPs. When he began directing music videos, many bands and musicians noted that Siega's background in rock music was beneficial. He has worked with bands such as Weezer, System of a Down, P.