Marengo, WI is a city located in Ashland County, Wisconsin and has a land area of 70.54 square miles (182.70 km2). The water area for the city is 0.18 square miles or 0.47 km2. There is one unique zip code in Marengo, Wisconsin and it is 54855. The area code(s) for Marengo is 715/534.
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