Ohio State Route 15 is a north-south highway in the center of the county. This connects Bryan to Pioneer and the Ohio Turnpike. OH St Rt 15 passes through the following towns in Williams County. Bryan West Jefferson Holiday City Pioneer
OH St Rt 15 is multi-plexed in Williams County. U.S. Rt. 127, from the Williams/Defiance County Line to near Bryan. Ohio State Route 2, near Bryan. U.S. Rt. 20A, near Holiday City.
The first BGS on EB I-80/90/OH Turnpike. Another BGS on EB I-80/90/OH Turnpike. A BGS on EB I-80/90/OH Turn. A BGS on EB I-80/90/OH Turn. A BGS on WB I-80/90/OH Turn. EB I-80/90/OH Turnpike at OH St Rt 15. WB U.S. Rt. 20A/NB OH St Rt 15 north of I-80/90. EB OH St Rt 15 north of U.S. Rt. 20. WB OH St Rt 15 south of Pioneer. WB OH St Rt 15 north of Pioneer. EB OH St Rt 15 at the Ohio/Michigan State Line.
