Markus Redmond (born February 5, 1971) is an American actor. He is best known for his role as Raymond Alexander, in the comedy-drama series Doogie Howser, M.D., co-created by Steven Bochco. Redmond joined the cast at the start of the show's second season in 1990 until the series ended in 1993. He worked with Bochco again on two other series, in recurring roles as P.O. Lucas on NYPD Blue and as Mark Washington in Murder One.

In 1999, Redmond was a series regular on the sitcom Family Rules, starring Greg Evigan. His other television credits include 21 Jump Street, Family Matters, the 1995 revival series Get Smart, Mad About You, Vengeance Unlimited, Angel, The Drew Carey Show and Curb Your Enthusiasm.

He also appeared in the films The Inkwell (1994) and Fight Club (1999). In 2007, Redmond starred and wrote the film If I Had Known I Was a Genius, a film that featured a number of notable actors in its cast.