Waltham, MN is a city located in Mower County, Minnesota and has a land area of 27.82 square miles (72.05 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in Waltham, Minnesota and it is 55982. The area code(s) for Waltham is 507.
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