 Pennsylvania Route 663 (PA 663) is a 22.98-mile-long (36.98 km) state highway in Bucks and Montgomery counties in southeast Pennsylvania. Its northern terminus is at PA 309 and PA 313 in Quakertown, where it continues eastward as PA 313, and its southern terminus is at PA 100 in Pottstown. Along the way, PA 663 also passes through the town of Pennsburg. It is called John Fries Highway between Pennsburg and Quakertown. It has an interchange with Interstate 476 (I-476, the Northeast Extension of the Pennsylvania Turnpike) at exit 44 west of Quakertown. The route was assigned in 1930, and it has had several realignments since its commissioning, including two major ones.
