Peter Marshall (May 27, 1902 – January 26, 1949) was a Scottish-American preacher, pastor of the New York Avenue Presbyterian Church in Washington, D.C., and was appointed as Chaplain of the United States Senate.

He is remembered popularly from the success of A Man Called Peter (1951), a biography written by his widow, Catherine Marshall, and the book's 1955 film adaptation, which was nominated for an Academy Award for its cinematography.

[4][page needed] Marshall is buried at Fort Lincoln Cemetery (Section C, Lot 344, Site 1) in Brentwood, Maryland.

[5] The Presbyterian Historical Society in Philadelphia, Pennsylvania, has an undated carbon copy transcript of Catherine Marshall’s biography, A Man Called Peter.

The McCain Library at Agnes Scott College in Decatur, Georgia holds a large collection of papers donated by the estate of Catherine Marshall.