Pennsylvania State Route 231 is a north-south highway in Washington County. This runs from near Avella to near Old Concord. PA St Rt 231 passes through the following towns in Washington County. Claysville East Finley PA St Rt 231 is multi-plexed in Washington County. Pennsylvania State Route 844, near West Middletown. Pennsylvania State Route 331, near Taylorstown. U.S. Rt. 40, at Claysville. PA St Rt 231 intersects the following highways in Washington County. Pennsylvania State Route 50, near Avella. Pennsylvania State Route 844, near West Middletown. Pennsylvania State Route 844, near West Middletown. Pennsylvania State Route 331, near Taylortown. Pennsylvania State Route 331, near Taylortown. Pennsylvania State Route 221, near Taylortown. U.S. Rt. 40, at Claysville. U.S. Rt. 40, at Claysville. Interstate 70, near Claysville. Pennsylvania State Route 18, near Old Concord.
