Thomas Benton Smith (February 24, 1838 – May 21, 1923) was a brigadier general in the Confederate States Army during the American Civil War.

He received an appointment to the United States Military Academy in West Point, New York, but resigned and returned home.

Later in the year, after being promoted to colonel of the 20th Tennessee and assigned command of a small brigade, he was part of the Confederate forces that unsuccessfully tried to seize the Union post at Baton Rouge, Louisiana.

Confederate Army commander John C. Breckinridge remarked in his official report that Smith "moved against the enemy in fine style.

However, lingering effects of the savage beating caused permanent damage, and Smith spent much his last 47 years in an insane asylum in Nashville, emerging occasionally for army reunions and other social events.