The T1 light tank was a United States Army light tank of the late 1920s and early 1930s that was only built in prototype form. The tank was an Army design built by James Cunningham, Son and Company. Introduced in 1927, it was developed up through 1932 as a series of modified versions. The tank was never mass-produced, nor was it ever used in combat.

James Cunningham, Son and Company was an American business based in Rochester, New York, initially manufacturing horse-drawn coaches, that from 1908 onward developed and produced automobiles. The Cunningham company was a pioneer in automobile production, credited with being one of the world's first developers and manufacturers of automobiles and, in 1916, one of the first carmakers to produce an American V8 engine automobile. Its Cunningham automobile was a pioneering American production automobile.