The Circle Star Theatre was a performing arts venue in San Carlos, San Mateo County, California. Its name is based on it being a theater in the round, featuring a rotating circular stage with none of its 3,743 seats further than 50 feet (15 m) from the stage. Unlike similar venues across the United States, the Circle Star Theatre stage had the ability to rotate in either direction without limit, thanks to the slip ring and brush system that supplied electrical power and lighting signals to it. The theatre's address was 2 Circle Star Way, San Carlos, CA 94070.
Its original concept when it opened in the early 1960s was a dinner theater similar to the Hyatt House Theatre in nearby Burlingame. Lewis & Dare productions hosted many Broadway touring shows, such as The Odd Couple, with Ernest Borgnine and Don Rickles.
Don Jo Medlevine sold the Circle Star Theater to Dr. Leonard Bloom. Dr. Bloom later sold the theater to a local car dealer. The new ownership did not have the same elite relationships with the top entertainers as Dr. Bloom had, so it was closed in December 1993. The building caught fire on April 18, 1997, damaging much of the backstage area, though by this time plans had already been made for its demolition. The theater was ultimately demolished to make way for the Circle Star Center, a complex containing two four-story office buildings and a small hotel.