U.S. Federal Route 20 is a east-west highway across Northern Williams County. This is the western most county that it passes in while in Ohio. U.S. Rt. 20 proviedes a toll-free alternative to Interstate 80/90/Ohio Turnpike. U.S. Rt. 20 passes through the following towns in Williams County. Columbia
Pioneer
Alvordton U.S. Rt. 20 is multi-plexed in Williams County. Ohio State Route 49, near Columbia.
Ohio State Route 576, near Bridgewater Center.
U.S. Rt. 127, from near Alvordton to the Williams/Fulton County Line. U.S. Rt. 20 intersects the following highways in Williams County. Ohio State Route 49, near Columbia. Ohio State Route 49, near Columbia.
Branches of U.S. Rt. 20 in Williams County. EB U.S. Rt. 20 at the Ohio Welcome Sign. WB U.S. Rt. 20 west of Columbia. WB U.S. Rt. 20 west of south OH St Rt 49. A guide marker on the ramp from EB I-80/90/OH Turn. A guide marker at the end of the ramp from EB I-80/90 at OH St Rt 49. A guide marker on WB I-80/90. EB U.S. Rt. 20 east of OH St Rt 49. WB U.S. Rt. 20/NB OH St Rt 576 near Montpelier. WB U.S. Rt. 20 east of U.S. Rt. 20A. WB U.S. Rt. 20 west of OH St Rt 15. A junction marker on NB OH St Rt 15.
