Below is a list of West Allis WI zip codes. For your research we have also included West Allis Area Code, Time Zone, UTC and the local Milwaukee County FIPS Code. Each West Allis Wisconsin zip code has a center Longitude / Latitude point (the West Allis center is -87.991401672363 / 42.994400024414). For your convenience we have also indicated if that zip code in West Allis observes Daylight Savings time.