Johann Gottlieb Rall (also spelled Rahl) (ca. 1726 – December 26, 1776) was a German colonel, best known for being in command of Hessian troops in Trenton, New Jersey at the Battle of Trenton during the American War of Independence.
Rall was probably born as a so-called "soldier child" ca. 1725. He was a son of Captain Joachim Rall from Stralsund, who served in the regiment of Major General Donop. The first mention of Johann Rall was as a new cadet of the same regiment on March 1, 1740, commanded at this time by Colonel Prince Casimir von Isenburg of Isenburg-Birstein.
He was promoted to warrant officer on July 25, 1741; to second lieutenant on August 28, 1745; and to captain on May 10, 1753. Rall was promoted to major on May 7, 1760, under Major General Bischhausen and transferred, in January 1763, into the Stein garrison regiment, where he was appointed lieutenant colonel. On April 22, 1771, he was transferred to the Mansbach Infantry Regiment as a colonel. He became commander of the regiment in January 1772.