Ohio State Route 726 is a north-south highway in North-Central Preble County. This spurs off of U.S. Rt. 127, north of Eaton and heads toward New Madison. OH St Rt 726 passes through the following town in Preble County. Eldorado OH St Rt 726 is not multi-plexed in Preble County. OH St Rt 726 crosses the following highways in Preble County. U.S. Rt. 40, near Gettysburg. Interstate 70, near Gettysburg. (NO INTERCHANGE). U.S. Rt. 127, near Eaton.