Lynda Day George (b. December 11, 1944, San Marcos, Texas) is an American television and film actress whose career spanned three decades from the 1960s to the 1980s. She was a cast member on Mission: Impossible (19711973), as well as being the wife of actor Christopher George.

Originally known as Lynda Day, her career began with guest roles on many television series of the 1960s including Route 66, Flipper, The Green Hornet, Mannix, The Fugitive, The Virginian and Bonanza. She had her first major role in a short-lived 1970 television series, The Silent Force, and later starred in the television pilot for Cannon in 1971. That same year, she was cast as Lisa Casey in the critically acclaimed series Mission: Impossible, a role for which she was nominated for a Golden Globe in 1972 and an Emmy Award in 1973. During the show's last season, she missed 7 episodes because of her maternity leave, hence, she was temporarily replaced by Barbara Anderson to fill the void.

She first met actor Christopher George when they starred together in the 1966 independent film The Gentle Rain. While working together again in the 1970 John Wayne film Chisum, they fell in love and were married on May 15, 1970.