Below is a list of Birchwood WI zip codes. For your research we have also included Birchwood Area Code, Time Zone, UTC and the local Washburn County FIPS Code. Each Birchwood Wisconsin zip code has a center Longitude / Latitude point (the Birchwood center is -91.55590057373 / 45.657199859619). For your convenience we have also indicated if that zip code in Birchwood observes Daylight Savings time.