Oscar Fitzallen Moore (January 27, 1817 – June 24, 1885) was a U.S. Representative from Ohio. Born in Lagrange, Ohio, Moore attended the public schools and , and was graduated from Washington (now Washington & Jefferson College, Washington, Pennsylvania, in 1836.He studied law.He was admitted to the bar in 1838 and commenced practice in Portsmouth, Ohio, in 1839.He served as member of the state house of representatives in 1850 and 1851.He served as member of the state senate in 1852 and 1853.