Below is a list of Monongahela PA zip codes. For your research we have also included Monongahela Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Monongahela Pennsylvania zip code has a center Longitude / Latitude point (the Monongahela center is -79.918197631836 / 40.196399688721). For your convenience we have also indicated if that zip code in Monongahela observes Daylight Savings time.