Karen Maruyama is an American actress and comedian. She has appeared on television in supporting roles in a number of sitcoms, including recurring characters on The Jamie Foxx Show, Strip Mall, Suddenly Susan, and Arrested Development. Maruyama is well known as an improviser and teacher of improvisation, has been a guest on both the American and British versions of Whose Line Is It Anyway?, and was also a member of The Groundlings troupe. She also appeared as a parking attendant in one episode of Curb Your Enthusiasm. She also played a nurse in the film The Bucket List (2007) and a housekeeper in the 2012 film The Campaign. She is part of the cast of Jim Henson Company's live stage show Puppet Up! - Uncensored, which has toured in Aspen, Las Vegas, Edinburgh, Sydney, and Melbourne and currently performs monthly at Avalon Hollywood. In 2013, in the series 2 Broke Girls (third season, seventh episode), she appears as Han's mother under the name Su-Min.

Karen was also featured as a fashion victim in one episode of the makeover show How Do I Look?. She also appeared as a non-celebrity contestant on the 1984 CBS game show Body Language under the name Karen Upshaw, saying she was from Perris, California. Her partners were celebrity players Ted Lange and Constance Towers. She was also on The New $25,000 Pyramid in 1983 with Audrey Landers and Michael McKean.