Theron Moses Rice (September 21, 1829 – November 7, 1895) was a U.S. Representative from Missouri.

He was admitted to the bar in June 1854 and practiced in Mahoning County, Ohio.

From June to October 1861 he served in a home guard unit commanded by Colonel Allen P. Richardson.

Rice then recruited a company which was mustered into service as part of the 26th Missouri Volunteer Infantry, and he served until the end of the war.

After the war Rice resumed practicing law in Tipton, Missouri.