Amherst Junction, WI is a city located in Portage County, Wisconsin and has a land area of 46.70 square miles (120.95 km2). The water area for the city is 1.10 square miles or 2.85 km2. There is one unique zip code in Amherst Junction, Wisconsin and it is 54407. The area code(s) for Amherst Junction is 715.
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