Liz Sheridan (born April 10, 1929) is an American actress.

Sheridan was born Elizabeth Sheridan in Westchester County, New York, the daughter of Elizabeth Poole-Jones, a concert singer, and Frank Sheridan, a classical pianist. Sheridan began her career as a dancer working in New York City in nightclubs and musicals. There, she met the then-unknown James Dean. Sheridan claims that she and Dean became engaged and had a short-lived romance. However, after he was cast in a play which looked to be successful, he drifted away from Sheridan and — despite the play's quick demise — this was the end of their affair. She has written a book on this subject, Dizzy and Jimmy. There she mentioned they were each others first 'romantic love.'

In the 1980s, Sheridan began acting as a supporting player in films and television series such as Moonlighting, Kojak, The A-Team and Cagney & Lacey. She got her first major role playing nosy neighbour, "Mrs. Raquel Ochmonek", on the NBC/TV series ALF. Sheridan is known for her recurring guest role as Helen Seinfeld, mother to Jerry Seinfeld in Seinfeld. She played the role for nine seasons, from 1990 to 1998.

Sheridan was married to the late Dale Wales.

Started out in show business as a dancer.

Was engaged to James Dean (I) and later wrote a book about their love called "Dizzy and Jimmy."

Considered Actress Elizabeth Montgomery (I) to be her best friend.