Indiana State Route 243 is a north-south highway in Southwestern Putnam County. It runs from U.S. Rt. 40, at Putnamville, to the Putnam/Owen County Line, near Cunot. IN St Rt 243 passes through the following town in Putnam County. Putnamville IN St Rt 243 is not multi-plexed in Putnam County. IN St Rt 243 intersects the following highways in Putnam County. U.S. Rt. 40, at Putnamville.