Indiana State Route 19 is the main north-south highway in Western Kosciusko County. It runs from the Elkhart County Line, near Nappanee, to the Fulton County Line, near Beaver Dam. IN St Rt 19 passes through the following towns in Kosciusko County. Enta Green Mentone IN St Rt 19 is not multi-plexed in Kosciusko County. IN St Rt 19 intersects the following highways in Kosciusko County. U.S. Rt. 30, at Etna Green. Indiana State Route 10, near Old Tip Town. Indiana State Route 25, at Mentone.