Sherry Lea Stringfield (born June 24, 1967) is an American actress. She is best known for playing the role of Dr. Susan Lewis on the hit medical television drama ER; a role for which she has received three Emmy Award nominations. Stringfield was one of ER's original cast, but she sensationally quit the show during its third season, despite being contractually tied to appear in five. She reprised the role in 2001, but quit once again in 2005.

Away from ER she has acted mainly on television, but she has also played various parts in films. Stringfield has famously left several major roles on successful television programmes at the height of their popularity, which has led to her being nicknamed "The Goodbye Girl" in Hollywood.

Sherry Stringfield was born in Colorado Springs as the oldest of three children, but mainly raised in Spring, Texas. In high school, she did both athletics and acting. Later, she attended the Acting Conservatory of the State New York at Purchase, from which she graduated in 1989 with a B.F.A. While attending the State University of New York at Purchase, she roomed with Parker Posey. During this time, she appeared in numerous off-Broadway productions. After working a short time in a theater box office, she accepted a 3 years contract as "Blake" in the daytime drama "Guiding Light, The" (1952). After a short break, spent with traveling, she returned to L.A. to co-star as "Laura Kelly" on "NYPD Blue" (1993). Stringfield is best known to television audiences around the world as "Dr. Susan Lewis" on NBC's hit medical drama, "ER" (1994), a role which has garnered her three Emmy nominations for Outstanding Lead Actress on a Drama Series as well as a Golden Globe nomination and a People's Choice Award nomination for Favorite Female Performer. With 112 Emmy nominations over the course of the show's run, it remains a critical and audience favorite. Her additional credits include the feature films, Autumn in New York (2000) with Richard Gere and Winona Ryder and 54 (1998) with Mike Myers (I), Salma Hayek and Ryan Phillippe. Stringfield currently resides in Los Angeles with her two children.