Susan Clark (born March 8, 1940 in Sarnia, Ontario) is a Canadian actress, best known as Katherine Papadapolis in the TV sitcom Webster. She is married to her Webster co-star Alex Karras. They met when they costarred in the TV movie, Babe, in which she played Babe Didrikson Zaharias, and he played her husband, professional wrestler George Zaharias.
Clark played Cherry Forever in the movie Porky's, Elizabeth Murray in Emily of New Moon and Elaine Moore in the television movie Trapped. She also played murderer Beth Chadwick in the Columbo episode "Lady in Waiting", which also starred Leslie Nielsen and Jessie Royce Landis.