Pennsylvania Route 851

Pennsylvania Route 851
Route information
Maintained by PennDOT
Length	32.592 mi[1] (52.452 km)
Major junctions
West end	PA 516 in Codorus Township
Major intersections	PA 616 in Railroad I-83 near Shrewsbury PA 24 in Stewartstown PA 425 in Fawn Grove
East end	PA 74 in Peach Bottom Township
Location
Country	United States
State	Pennsylvania
Counties	York
Highway system
Pennsylvania State Route System Interstate US State Scenic Legislative
← PA 850 → PA 852

Pennsylvania Route 851 (PA 851) is a 32.6-mile-long (52.5 km) state highway located in York County, Pennsylvania. The western terminus is located at PA 516 in the Codorus Township community of Sticks. The eastern terminus is located at PA 74 in Peach Bottom Township.

PA 851 is a two-lane undivided road that runs through rural areas in southern York County a short distance to the north of the Maryland border. The route heads east from Sticks to New Freedom, where it turns north and intersects PA 616 in Railroad. PA 851 heads east through Shrewsbury and comes to an interchange with Interstate 83 (I-83). From here, the route heads east and passes through Stewartstown, where it forms a short concurrency with PA 24, and Fawn Grove, where it intersects PA 425, before continuing to its terminus. PA 851 has a truck route, PA 851 Truck, which bypasses the stretch between New Freedom and Shrewsbury.

PA 851 was designated in 1928 to run from Woodbine north to PA 74 in Airville. In 1937, PA 851 was realigned to run from U.S. Route 111 (US 111) at Main Street in Shrewsbury east to PA 74 north of Delta, with the former alignment between Woodbine and Airville becoming an extension of PA 124 (now PA 425). The same year, the road between Sticks and New Freedom became an extended PA 516 while the road between New Freedom and Railroad became an extended PA 616. PA 516 was extended east to I-83/US 111 east of Shrewsbury in the 1950s, replacing PA 616 between New Freedom and Railroad and cutting the west end of PA 851 back to the interchange. PA 851 was extended west to PA 516 in Sticks in the 1960s, replacing the part of PA 516 between Sticks and I-83. A roundabout was constructed at PA 74 in 2008.