Pennsylvania Route 21

Pennsylvania Route 21
Route information
Maintained by PennDOT
Length	50.751 mi[1] (81.676 km)
Existed	1927–present
Major junctions
West end	WV 891 in Richhill Township
Major intersections	US 19 in Waynesburg I-79 in Morrisville US 40 / US 119 / PA 43 in Uniontown
East end	US 40 Bus. in Uniontown
Location
Country	United States
State	Pennsylvania
Counties	Greene, Fayette
Highway system
Pennsylvania State Route System Interstate US State Scenic Legislative
← US 20 → US 22

Pennsylvania Route 21 (PA 21) is a 50.75-mile (81.67 km) long east–west state highway in the US state of Pennsylvania. The western terminus of the route is at the West Virginia state line in Richhill Township, where PA 21 continues into West Virginia as West Virginia Route 891. The eastern terminus is at U.S. Route 40 Business in Uniontown. The route is known as the Roy E. Furman Highway for most of its length. PA 21 serves Waynesburg and Masontown along the way.

PA 21 was originally designated in 1927 between the West Virginia border and Uniontown, originally following an alignment further to the north between Carmichaels and Uniontown via New Salem. By 1950, the route was moved to its current alignment east of Carmichaels, with bypasses of Carmichaels and Masontown constructed by 1960.