Peter Conover Hains III (May 11, 1901 – July 3, 1998) was an American Army cavalry officer and major general who competed in the 1928 Olympic games in the modern pentathlon.

[3] General Hains served as commander of the First Armored Regiment in North Africa during the war.

After the war, he was assigned to Washington as deputy director of the office of the secretary of defense.

[5] He died at Fort Belvoir, Virginia on July 3, 1998, and was buried at Arlington National Cemetery.

This biographical article related to modern pentathlon in the United States is a stub.