Thomas Weir (American soldier)

Thomas Benton Weir
Born	September 28, 1838 Nashville, Ohio
Died	December 9, 1876 New York City
Place of burial	Cypress Hills National Cemetery, Brooklyn, New York
Allegiance	United States of America Union
Service/branch	United States Army Union Army
Years of service	1861–76
Rank	Captain (Regular Army) Colonel (Brevet)
Commands	Company D, 7th U.S. Cavalry
Battles/wars	American Civil War American Indian Wars
Alma mater	University of Michigan

Captain Thomas Benton Weir (September 28, 1838 – December 9, 1876) was an officer in the 7th Cavalry Regiment (United States), notable for his participation in the Battle of the Little Bighorn, also known as Custer's Last Stand.

Weir first served under General George Armstrong Custer during the American Civil War, and after the war continued serving under Custer's command up to the famous battle in 1876. During the Little Bighorn battle, Weir disobeyed orders to remain in a defensive position at Reno Hill and led a cavalry group that attempted to come to Custer's aid. Weir and the group retreated back to Reno Hill in the face of overwhelming numbers of Native American warriors. A hill on the battlefield, Weir Point, is named in his honor and marks the farthest point of Weir's advance.

Reportedly deeply depressed by his experience in the historic battle, Weir's health declined, and he died only a few months afterwards, aged 38.