Lyman R. Critchfield
 Lyman R. Critchfield (May 22 1831 – November 28 1917) was a Democratic politician from the state of Ohio. He was Ohio Attorney General 1863-1865.Lyman R. Critchfield was born May 22 1831 at Danville Knox County Ohio. His family moved to Millersburg Holmes County Ohio in 1834. He attended public schools and graduated from Ohio Wesleyan University. He then studied law and was admitted to the bar in 1853 when he began practicing in Millersburg.