Pennsylvania Route 313 (PA 313) is a mostly 2-lane, 18-mile (29 km) long state highway entirely within Bucks County, Pennsylvania. It is an east–west road, although it runs almost purely northwest/southeast through most of its course. It is a major arterial road in central and northern Bucks County as it connects several large towns.

The westbound end of PA 313 is at an intersection with Pennsylvania Route 309 in Quakertown. The eastbound end is at an intersection with Pennsylvania Route 263 in the Doylestown Township hamlet of Furlong.

PA 313 begins at a traffic light with Pennsylvania Route 309 and 663 in Quakertown. Known as West Broad Street, 313 goes through downtown Quakertown intersecting with Main Street and Pennsylvania Route 212. 313 then makes a sudden dive to the right and becomes East Broad Street just before leaving Quakertown. The road then becomes the Doylestown Pike headed for Keelersville. In Keelersville, Pennsylvania Route 563 comes in from the left and merges with 313 for 1.3 miles (2.1 km). 563 leaves to the right on North Ridge Road at 6.0 miles (9.7 km). 313, now known as West Dublin Pike, goes through East Rockhill and soon after Dublin. 313 intersects with Pennsylvania Route 113 at 8.8 miles (14.2 km) in Hilltown Township. 313 comes upon an interchange with Pennsylvania Route 611 in Doylestown.

U.S. Route 202 intersects east of downtown Doylestown. Now known as Swamp Road, 313 ends at Pennsylvania Route 263.

PA 313 was first signed in 1928, at which time the route stretched from Quakertown to PA 113. In 1946, the designation was extended to US 202 just east of Doylestown. Later, in 1977, the designation was extended to its present location at the junction with PA 263.

The entire route is in Bucks County.