Below is a list of Germantown OH zip codes. For your research we have also included Germantown Area Code, Time Zone, UTC and the local Montgomery County FIPS Code. Each Germantown Ohio zip code has a center Longitude / Latitude point (the Germantown center is -84.355903625488 / 39.632099151611). For your convenience we have also indicated if that zip code in Germantown observes Daylight Savings time.