Second Wife is a 1930 American drama film produced and released by RKO Pictures.

It was directed by Russell Mack, written by Hugh Herbert and Bert Glennon, based on the play All the King's Men by Fulton Oursler.

Florence ignores the warnings of Gilbert Gaylord, who is also interested in marrying her, that she doesn't know what she is getting herself into; that no woman will ever be able to fill the void in Fairchild's life left by the death of his wife.

Sensing that he and his new wife need some time alone together to start their new lives, he sends his seven-year-old son, Walter Jr., to a boarding school in Switzerland.

Mordaunt Hall, The New York Times critic, gave the film a mixed review, praising the performances, while giving a lukewarm reception of the writing and direction.