Below is a list of Watertown OH zip codes. For your research we have also included Watertown Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Watertown Ohio zip code has a center Longitude / Latitude point (the Watertown center is -81.635101318359 / 39.465801239014). For your convenience we have also indicated if that zip code in Watertown observes Daylight Savings time.