Pennsylvania Route 551

Pennsylvania Route 551
Route information
Maintained by PennDOT and Pulaski Township
Length	33.638 mi[1] (54.135 km)
Major junctions
South end	PA 18 in Beaver Falls
Major intersections	I-376 Toll in Big Beaver PA 168 in Darlington PA 351 in Enon Valley PA 108 in North Beaver Township PA 317 in North Beaver Township US 224 in Mahoning Township US 422 in Mahoning Township PA 208 in Pulaski Township
North end	PA 18 near West Middlesex
Location
Country	United States
State	Pennsylvania
Counties	Beaver, Lawrence, Mercer
Highway system
Pennsylvania State Route System Interstate US State Scenic Legislative
← PA 550 → PA 552

Pennsylvania Route 551 (PA 551) is a 34-mile-long (55 km) state highway located in Beaver, Lawrence, and Mercer counties in Pennsylvania. The southern terminus is at PA 18 in Beaver Falls. The northern terminus is at PA 18 near West Middlesex.

Though officially a spur route of PA 51, PA 551 is more suited as a spur route of PA 18, due to PA 551 ending at PA 18 at both ends without intersecting with PA 51 at all. (PA 51 and PA 551 come within a mile of each other near Darlington, Pennsylvania at their closest point.) While PA 18 passes through larger cities, PA 551 goes through more rural areas.