Ohio State Route 800 is a north-south highway in Western Belmont County. This runs from the Guernsey/Belmont County Line to the Belmont/Monroe County Line. OH St Rt 800 passes through the following towns in Belmont County. Swellsville Barnesville Somerton OH St Rt 800 is multi-plexed in Belmont County. Ohio State Route 147, at Barnesville. OH St Rt 800 intersects the following highways in Belmont County. Interstate 70, near Hendrysburg. U.S. Rt. 40, near Hendrysburg. Ohio State Route 147, at Banresville. Ohio State Route 147, at Barnesville. Ohio State Route 26, near Baileys Mills.
