Below is a list of Watertown SD zip codes. For your research we have also included Watertown Area Code, Time Zone, UTC and the local Codington County FIPS Code. Each Watertown South Dakota zip code has a center Longitude / Latitude point (the Watertown center is -97.1209 / 44.9041). For your convenience we have also indicated if that zip code in Watertown observes Daylight Savings time. For more information on Watertown South Dakota you will find helpful business links and searches.