Thomas Church Haskill Smith, or Thomas C. H. Smith, (1819-1897) was a lawyer and businessman, during the American Civil War a Brigadier General in the Union Army and later a Major and paymaster in the U. S. Army. He was then promoted to Brigadier-General, to date from November 29, 1862, and was transferred to the staff of General Pope, and served with General Pope during his campaign, while in command of the Army of the Potomac in the summer of 1862 and was at the 2nd Battle of Manassas. Following that battle he was a witness against the accused at the courtmartial of General Fitz John Porter.