Indiana State Route 23 runs north-south in Starke County. This runs from the St. Joseph/Starke County Line, near Koontz, to Indiana State Route 10, near Ober. IN St Rt 23 passes through the following towns in Starke County. Koontz Grovertown
Ober IN St Rt 23 is not multi-plexed in Starke County. IN St Rt 23 intersects the following highways in Starke County. U.S. Rt. 30, at Grovertown.