Beatrice Ann Firth (January 27, 1946 – June 20, 2008) was a Canadian politician, who represented the electoral district of Riverdale South in the Yukon Legislative Assembly from 1982 to 1996. She was a member of the Yukon Progressive Conservative Party. Born in Yorkton, Saskatchewan in 1946, she worked as a registered nurse before entering politics. Firth moved to Whitehorse in 1967 and worked at the Whitehorse General Hospital. Firth did not run in the 1996 election. She died on June 20, 2008 of cancer.