SEPTA Route 13, also known as the Chester Avenue Line, is a trolley line operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) that connects 13th Street Station in downtown Philadelphia, Pennsylvania, with Yeadon and Darby, Pennsylvania. It is one of five lines that are part of the Subway-Surface Trolley system. From 2024 onwards, Route 13 will be referred as the T3 Chester Avenue Line
SEPTA Route 13 makes one of its few runs to the Darby Transportation Center.