Ohio State Route 193 runs breifly in North-Central Mahoning County. It goes from Interstate 680, to the Mahoning/Trumbull County Line on the northside of Youngstown. OH St Rt 193 passes through the following town in Mahoning County. Youngstown OH St Rt 193 is not multi-plexed in Mahoning County. OH St Rt 193 intersects the following highways in Mahoning County. Interstate 680, at Youngstown. U.S. Rt. 422, at Youngstown. Ohio State Route 289, at Youngstown.