Pennsylvania Route 124 (PA 124) is a 12.8-mile-long (20.6 km) state route in York County in south central Pennsylvania. The western terminus of the route is at the eastern border of York, where the road continues west as East Prospect Street towards PA 74. Its eastern terminus is at PA 425 and PA 624 in the Lower Windsor Township community of Craley, where PA 124 continues south as PA 425. PA 124 heads east from its beginning through suburban areas to the east of York, intersecting Interstate 83 (I-83) and PA 24. Farther east, the route heads through rural land in eastern York County to East Prospect, where it turns south and comes to its terminus.