Come Blow Your Horn [with Danny Simon] 1961

Little Me [adaptor; based on the novel by Patrick Dennis] (musical) 1962

*Barefoot in the Park 1963

*The Odd Couple [revised 1985] 1965

The Star-Spangled Girl 1966

Sweet Charity [adaptor; from the screenplay The Nights of Cabiria by Federico Fellini] 1966

*Plaza Suite 1968

Promises, Promises [adaptor; from the screenplay The Apartment by Billy Wilder and I. A. L. Diamond] 1968

*Last of the Red Hot Lovers 1969

The Gingerbread Lady 1970

*The Prisoner of Second Avenue 1971

*The Sunshine Boys 1972

The Good Doctor 1973

God's Favorite 1974

*California Suite 1976

*Chapter Two 1977

They're Playing Our Song 1978

I Ought to Be in Pictures 1980

Fools 1981

*Brighton Beach Memoirs 1982

*Biloxi Blues 1984

Broadway Bound 1986

Rumors 1988

Lost in Yonkers (musical comedy) 1991

Jake's Women 1992

Laughter on the 23rd Floor (comedy) 1993

London Suite 1995

The Out-of-Towners 1970

The Heartbreak Kid [adaptor; from the short story by Bruce Jay Friedman] 1972

Murder by Death 1976

The Goodbye Girl 1977

The Cheap Detective 1978

Seems Like Old Times 1980

Only When I Laugh 1981

Max Dugan Returns 1983

The Lonely Guy [with Ed Weinberger and Stan Daniels] 1984

The Slugger's Wife 1985

The Marrying Man 1991

Rewrites 1996

*Simon also adapted these plays for film.