SS John M. Harlan was a Liberty ship built in the United States during World War II. She was named after John M. Harlan, an Associate Justice of the Supreme Court of the United States.
John M. Harlan was laid down on 5 May 1943, under a Maritime Commission (MARCOM) contract, MC hull 1497, by J.A. Jones Construction, Brunswick, Georgia; sponsored by Mrs. Henry V. Mason, and launched on 29 August 1943.
She was allocated to Moore-McCormack Lines, Inc., on 16 September 1943. On 3 March 1948, she was laid up in the National Defense Reserve Fleet in Mobile, Alabama. On 25 February 1966, she was sold, along with and, to Southern Scrap Material for $151,079.79, for scrapping, she was delivered on 11 April 1966.