Moses Ayers McCoid (November 5, 1840 – May 19, 1904) was a Union Army officer in the American Civil War and a three-term Republican U.S. Representative from Iowa's 1st congressional district in southeastern Iowa. Born near Bellefontaine, Ohio, McCoid attended the public schools, Fairfield University, and Washington (now Washington and Jefferson) College, in Washington, Pennsylvania.He studied law in Fairfield, Iowa with future Congressman and U.S. Senator James F. Wilson.He was admitted to the bar in 1861 and commenced practice in Fairfield.