Below is a list of Marietta OH zip codes. For your research we have also included Marietta Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Marietta Ohio zip code has a center Longitude / Latitude point (the Marietta center is -81.457298278809 / 39.419998168945). For your convenience we have also indicated if that zip code in Marietta observes Daylight Savings time.