Ohio State Route 661 is a north-south highway in North-Central Licking County. It runs from Ohio State Route 16/37 at Granville, to the Licking/Knox County Line, near Homer. OH St Rt 661 passes through the following towns in Licking County. Granville Homer OH St Rt 661 is not multi-plexed in Licking County. OH St Rt 661 intersects the following highways in Licking County. Ohio State Route 16, at Granville. Ohio State Route 37, at Granville. Ohio State Route 657, near Homer. U.S. Rt. 62, near Homer.