José Manuel Rafael Simeón de Mier y Terán (February 18, 1789 — July 3, 1832), generally known as Manuel de Mier y Terán, was a noted military and political figure during the Mexican War of Independence and during the era of the First Republic serving in the Mexican congress and as Minister of War. He made an inspection of Texas on behalf of the government and was placed in charge of securing the area after the Mexican government banned further American immigration in 1830.