Below is a list of Waltham MN zip codes. For your research we have also included Waltham Area Code, Time Zone, UTC and the local Mower County FIPS Code. Each Waltham Minnesota zip code has a center Longitude / Latitude point (the Waltham center is -92.869598388672 / 43.81969833374). For your convenience we have also indicated if that zip code in Waltham observes Daylight Savings time.