Below is a list of Watertown WI zip codes. For your research we have also included Watertown Area Code, Time Zone, UTC and the local Jefferson County FIPS Code. Each Watertown Wisconsin zip code has a center Longitude / Latitude point (the Watertown center is -88.726997375488 / 43.182998657227). For your convenience we have also indicated if that zip code in Watertown observes Daylight Savings time.