Below is a list of Richfield WI zip codes. For your research we have also included Richfield Area Code, Time Zone, UTC and the local Washington County FIPS Code. Each Richfield Wisconsin zip code has a center Longitude / Latitude point (the Richfield center is -88.194396972656 / 43.256198883057). For your convenience we have also indicated if that zip code in Richfield observes Daylight Savings time.