Below is a list of Barnesville MD zip codes. For your research we have also included Barnesville Area Code, Time Zone, UTC and the local Montgomery County FIPS Code. Each Barnesville Maryland zip code has a center Longitude / Latitude point (the Barnesville center is -77.377799987793 / 39.220901489258). For your convenience we have also indicated if that zip code in Barnesville observes Daylight Savings time.