William T. O'Higgins (1829-1874) was a Catholic chaplain in the American Civil War. He served in the 10th Ohio Infantry. Born William T. Higgins in 1829 near the border of counties Leitrim and Longford, Ireland, he later took the last name of his uncle (Bishop William O'Higgins (1793-1853)), styled O'Higgins, after the royals. After studying in Maynooth at the Royal College of St. Patrick's, he was sent to British Guiana in the West Indies. He arrived in Philadelphia on May 23, 1857 and joined the Archdiocese of Cincinnati. From 1860 to 1861, he was the assistant to Rev. Richard Gilmour at St. Patrick's in Cincinnati.