John Matthew Moore (November 18, 1862 – February 3, 1940) was an American rancher and statesman from Texas who served in the United States House of Representatives from District 8 from 1905 to 1913. Moore was appointed Secretary of State of Texas by Governor Sul Ross on January 21, 1887 at the age of 25. He served throughout Governor Ross's term. Moore was elected a member of the Texas House of Representatives in 1896.