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is a city in Sibley County, Minnesota, United States. The population was 1,367 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 1.0 square miles (2.7 km²), all of it land. The South Branch of the Rush River starts near Winthrop.
Minnesota State Highways 15 and 19 are two of the main routes in the city.