Marc Henry Bonilla (born July 3, 1955) is an American guitarist, singer, and composer, who has worked as a sideman to artists such as Keith Emerson, Ronnie Montrose, Glenn Hughes, Edgar Winter, David Coverdale, and Asia.

In addition, he had cameo roles in the 1997 television series Night Man about a crime-fighting sax player, for which he was the musical director and acted as a performer (with his band) in several episodes under the alias Marc Bonilla and Dragonchoir.

He has done guitars for numerous films such as The Replacements, The Scorpion King, Spider-Man 2, Iron Man 2, Green Lantern, The Bourne Legacy, and composed and performed the music on the hit series, Justified, on FX channel, with keyboardist Steve Porcaro (Toto).

In 2012, Marc completed an album with Keith Emerson titled The Three Fates Project with the Munich Radio Orchestra, conducted by Terje Mikkelsen.

Guitar work for the Toy Matinee LP was done by LA studio guitarist Tim Pierce, though Bonilla replaced him for the touring incarnation of the band along with Sheryl Crow, Spencer Campbell, and Toss Panos.

In April 2017, Bonilla and Eddie Jobson began the "Fallen Angels Tour," a tribute to the music of John Wetton & Keith Emerson.