William H. Barnes

William H. Barnes
date of birth unknown, died 24 December 1866
Place of birth	Saint Mary's County, Maryland
Allegiance	United States Army
Rank	Sergeant
Unit	38th U.S. Colored Infantry Regiment
Battles/wars	American Civil War * Battle of Chaffin's Farm
Awards	Medal of Honor

William H. Barnes (date of birth unknown, died 24 December 1866) was a Union Army soldier during the American Civil War and a recipient of America's highest military decoration—the Medal of Honor.

At the Battle of Chaffin's Farm, on 29 September 1864, Barnes was serving as a Private in Company C of the 38th United States Colored Infantry Regiment. He was awarded the Medal of Honor for being "[a]mong the first to enter the enemy's works; although wounded." His medal was issued six months after the battle, on 6 April 1865.

Barnes reached the rank of Sergeant before leaving the Army. After his death, a marker in his memory was placed in San Antonio National Cemetery, San Antonio, Texas.