Marc Menchaca (born October 10, 1975) is an American actor, writer, and director. He was co-director, co-writer, and lead actor of the 2013 Heartland Film Festival movie This Is Where We Live and was awarded best actor at the Breckenridge Film Festival in 2016 for his lead role in the film Reparation and his lead role in #LIKE, in 2021 at the Oxford Film Festival. He has appeared in several television shows, including Ozark in 2018 and The Sinner, Manifest, and The Outsider in 2019.

Menchaca first became interested in performing as a student at Central High School. After graduating, he attended Texas A&M University, earning a bachelor's degree in English; it was also where he acted in his first play. He participated in a summer acting program at the Circle in the Square Theatre School in Manhattan before pursuing an acting career in his twenties. He is an alumnus of the William Esper Studio.