Today william penn, Darby PA is count around 53 homes for sale at current average listing price of $232,963. Nearby neighborhoods of william penn are None Available, Yeadon, Lansdowne, Cobbs Creek, Landsdowne Station, Achey Lane, Aldan, Aldham, Beverly Hills, Collingdale. Most of william penn homes are 3 bedrooms with 2 bathrooms.