Pennsylvania Route 23 is an 81.14-mile-long (130.58 km) state highway in southeastern Pennsylvania. The route begins at PA 441 in Marietta and heads east to U.S. Route 1 at City Avenue on the border of Lower Merion Township and Philadelphia. PA 23 begins at Marietta in Lancaster County and continues east to Lancaster, where it passes through the city on a one-way pair of streets and intersects US 222 and US 30.

Pennsylvania Route 441 is a 32-mile-long (51 km) state route that is located in central Pennsylvania in the United States. It primarily parallels the Susquehanna River through Lancaster and Dauphin counties.