Below is a list of Mercer WI zip codes. For your research we have also included Mercer Area Code, Time Zone, UTC and the local Iron County FIPS Code. Each Mercer Wisconsin zip code has a center Longitude / Latitude point (the Mercer center is -90.066596984863 / 46.166999816895). For your convenience we have also indicated if that zip code in Mercer observes Daylight Savings time.