Arno Voss (April 16, 1821 – March 23, 1888) was a German American military commander, lawyer, and politician. After studying law in Ohio, Voss came to Chicago, Illinois to edit a newspaper. He later established a law practice there. In 1862, he was named colonel of the 12th Illinois Cavalry, leading the brigade until 1864. After the war, Voss re-opened his practice and served one term in the Illinois House of Representatives.