Pennsylvania State Route 331 is an east-west highway in West-Central Washington County. It runs from the Pennsylvania/West Virginia State Line, near Bethany, WV, to Pennsylvania State Route 844/TRUCK Pennsylvania State Route 331, near West Middletown. PA St Rt 331 passes through the following town in Washington County. Acheson PA St Rt 331 is multi-plexed in Washington County. Pennsylvania State Route 231, near Acheson. PA St Rt 331 intersects the following highways in Washington County. Pennsylvania State Route 231, near West Middletown. TRUCK Pennsylvania State Route 331, near West Middletown. Pennsylvania State Route 231, at Acheson. Pennsylvania State Route 844, near West Middletown. TRUCK Pennsylvania State Route 331, near West Middletown.
Branches of PA St Rt 331. A junction marker on EB PA St Rt 844/TK PA St Rt 331.
