Below is a list of Fredericktown PA zip codes. For your research we have also included Fredericktown Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Fredericktown Pennsylvania zip code has a center Longitude / Latitude point (the Fredericktown center is -79.998001098633 / 40.002601623535). For your convenience we have also indicated if that zip code in Fredericktown observes Daylight Savings time.