Life with Father is a 1939 play by Howard Lindsay and Russel Crouse, adapted from a humorous autobiographical book of stories compiled in 1935 by Clarence Day. The Broadway production ran for 3,224 performances over 401 weeks to become the longest-running non-musical play on Broadway, a record that it still holds. The play was adapted into a 1947 feature film and a television series.

Clarence Shepard Day Jr. was an American author and cartoonist, best known for his 1935 work Life with Father.