County Named 1815. For Lieut. Col. John Allen, born in Va., 1771, came to Ky., 1779. Practiced law in Shelby County. State Representative, 1801-07, and State Senate, 1807-13. Killed in battle at River Raisin, Jan. 22, 1813, and one of nine officers at that battle for whom Kentucky counties named. Allen County formed by Act of Assembly, from Warren and Barren Counties.