Below is a list of Dayton MD zip codes. For your research we have also included Dayton Area Code, Time Zone, UTC and the local Howard County FIPS Code. Each Dayton Maryland zip code has a center Longitude / Latitude point (the Dayton center is -76.976501464844 / 39.242099761963). For your convenience we have also indicated if that zip code in Dayton observes Daylight Savings time.