William Thomas Simmons (29 January 1843 - 27 December 1908) was a first lieutenant in the United States Army who was awarded the Medal of Honor for gallantry at the Battle of Nashville in Tennessee during the American Civil War.

[1][2][4] Simmons enlisted in the Army on 1 August 1861 at Springfield, Illinois as a second lieutenant and was commissioned into Company C of the 11th Missouri Infantry Regiment on the same day.

On 16 December 1864, at the Battle of Nashville, he wounded a Confederate color bearer and captured the flag of the 34th Alabama Infantry.

[2][4] Simmons' Medal of Honor citation reads:[2] The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to First Lieutenant William Thomas Simmons, United States Army, for extraordinary heroism on 16 December 1864, while serving with Company C, 11th Missouri Infantry, in action at Nashville, Tennessee, for the capture of the flag of the 34th Alabama Infantry (C.S.A.).

Being the first to enter the works, he shot and wounded the enemy color bearer.Simmons took a leave of absence in Washington D.C. after capturing the flag and was mustered out of the Army on 15 January 1866.