Birchwood, WI is a city located in Washburn County, Wisconsin and has a land area of 159.96 square miles (414.29 km2). The water area for the city is 13.59 square miles or 35.20 km2. There is one unique zip code in Birchwood, Wisconsin and it is 54817. The area code(s) for Birchwood is 715.
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