Merrimac, WI is a city located in Sauk County, Wisconsin and has a land area of 36.46 square miles (94.43 km2). The water area for the city is 3.27 square miles or 8.47 km2. There is one unique zip code in Merrimac, Wisconsin and it is 53561. The area code(s) for Merrimac is 608.
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