Pennsylvania State Route 208 runs east-west in Southeastern Mercer County. It runs from the Lawrence/Mercer County Line, near Volant, to the Venango/Mercer County Line, near Barkeyville. PA St Rt 208 passes through the following towns in Mercer County. Leesburg London Grove City PA St Rt 208 is multi-plexed in Mercer County. U.S. Rt. 19, at Leesburg. Pennsylvania State Route 258, near London. Pennsylvania State Route 173, at Grove City. PA St Rt 208 intersects the following highways in Mercer County. U.S. Rt. 19, at Leesburg. U.S. Rt. 19, at Leesburg. Pennsyvlania State Route 258, near London. Interstate 79, near London. Pennsyvlania State Route 258, at London. Pennsylvania State Route 58, at Grove City. Pennsylvania State Route 173, at Grove City. Pennsylvania State Route 173, near Grove City.
