Maureen Denise McCormick (born August 5, 1956) is an American actress, reality show participant, and recording artist. She is best known as a child actor who played Marcia Brady in the television series The Brady Bunch from 1969 to 1974.

McCormick was born in Encino, California, the daughter of Irene (née Beckman) and William McCormick, a teacher. She first gained notice at the age of six after winning the Baby Miss San Fernando Valley beauty pageant. She made her television debut in 1964 in Barbie doll and Chatty Cathy commercials. She also lent her voice to the redesigned Chatty Cathy doll that was introduced in 1970. She appeared in two episodes of Bewitched and played guest roles on I Dream of Jeannie, Honey West, The Farmer's Daughter, and My Three Sons.

The Brady Bunch was an American sitcom about a blended family that aired from 1969 to 1974 on ABC and whose continued popularity has led to spinoffs, movies, and a largely uninterrupted airing in syndication. McCormick played the eldest daughter Marcia, a popular girl with a perky personality.