Barbara Williams (born 1953) is a Canadian-born American actress. Williams has starred in the 1984 Paramount film Thief of Hearts, the 1988 film Watchers and the 1992 film Oh, What a Night. She garnered a Genie Award nomination for Best Supporting Actress at the 21st Genie Awards for Love Come Down.
Williams was born in Vancouver Island, British Columbia, the daughter of Simone and Jack Williams, a tugboat skipper and logger. She is the wife of social and political activist Tom Hayden.