Winthrop, MN is a city located in Sibley County, Minnesota and has a land area of 108.06 square miles (279.87 km2). The water area for the city is 0.80 square miles or 2.07 km2. There is one unique zip code in Winthrop, Minnesota and it is 55396. The area code(s) for Winthrop is 507.
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