Clarence "Nick" Carter (June 6, 1918 – October 25, 1989) of San Francisco, California, was a top-level amateur tennis player in the 1940s and 1950s.
Carter won the singles championship at the Cincinnati Masters in 1946, defeating Filipino Davis Cupper Felicisimo Ampon in the Round of 16, Earl Cochell in the quarterfinals, George Ball of El Paso, Texas, in the semifinals and George Richards, of San Diego, California, in the final.
He also won the doubles title in Cincinnati that year with Norman Brooks of San Francisco, California.
Additionally, he coached Rosie Casals, who became a touring professional and won Grand Slam doubles titles with Billie Jean King.
He also coached many state and nationally ranked junior players while as a teaching professional at Arden Hills Swimming and Tennis Club, where Mark Spitz trained, in Carmichael, California.