John Leonard Pierce (April 25, 1895 – February 12, 1959) was a United States Army officer with the rank of brigadier general.

[1] After return to the United States, Pierce stayed in the Army and was interested in mobile warfare and the development of armor.

At the beginning of World War II, Pierce served as a Deputy Chief of Staff of the 3rd Armored Division under command of Major general Alvan C. Gillem.

In June 1943, Pierce was promoted to the rank of brigadier general and was appointed a Chief of Staff of Armored Command.

Pierce was subsequently transferred back to the United States, where he was appointed the President of the Secretary of War's Discharge Review Board.