Gray (September 21, 1834 - November 22, 1906) was a Union Army soldier in the American Civil War who received the U.S. military's highest decoration, the Medal of Honor.

He was awarded the Medal of Honor, for extraordinary heroism shown on May 16, 1864, while serving as a Sergeant with Company C, 21st Connecticut Infantry Regiment, at Drewry's Bluff, Virginia.

The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Sergeant Robert A.

Gray, United States Army, for extraordinary heroism on 16 May 1864, while serving with Company C, 21st Connecticut Infantry, in action at Drewry's Bluff, Virginia.

While retreating with his regiment, which had been repulsed, Sergeant Gray voluntarily returned, in face of the enemy's fire, to a former position and rescued a wounded officer of his company who was unable to walk.