Thomas Hewson Neill (1826–1885) was a native of Pennsylvania, became a general in the American Civil War, serving in the Army of the Potomac in some of its most important campaigns.

Educated in local schools, he attended the University of Pennsylvania before transferring to the United States Military Academy at West Point, New York.

Then he was made colonel of the 23rd Pennsylvania Infantry, which he led in Darius Couch’s division of IV Corps Army of the Potomac in the Peninsula Campaign and the Seven Days Battles.

Neill had his horse shot from under him in the fight for Scott's Ford, Sedgwick's means of escaping across the Rappahannock River from converging Confederate attacks.

By the end of the battle, Neill’s brigade was on the far right flank of the army’s infantry line, positioned on Wolf Hill.

Getty returned early in the Siege of Petersburg, and Neill became a staff officer in XVIII Corps of the Army of the James.

He received brevet promotion as a major general of volunteers and brigadier of regulars for his war service on March 13, 1865.