Charles Pomeroy Stone (September 30, 1824 – January 24, 1887) was a career United States Army officer, civil engineer, and surveyor. He fought with distinction in the Mexican–American War, earning two brevet promotions for his performance in the conflict. After resigning and surveying for the Mexican Government, he returned to the U.S. Army to fight in the American Civil War.

Stone was reportedly the first volunteer to enter the Union Army, and during the war he served as a general officer, noted for his involvement at the Battle of Ball's Bluff in October 1861. Held responsible for the Union defeat, Stone was arrested and imprisoned for almost six months, mostly for political reasons. He never received a trial, and after his release he would not hold a s