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is a city in St. Croix County, Wisconsin, United States. As of the 2000 census, its population was 8,775. Its 2008 estimated population was 11,865. Hudson has experienced considerable growth in recent years because of its proximity to the Twin Cities. Hudson has been considered part of the Minneapolis-Saint Paul metro area since 2000. The village of North Hudson is located directly to the north of Hudson.
According to the United States Census Bureau, the city has a total area of 6.3 square miles (16.2 km²), of which, 5.4 square miles (14.0 km²) of it is land and 0.9 square miles (2.3 km²) of it (13.88%) is water.
Interstate Highway 94, U.S. Highway 12, and Wisconsin Highway 35 are three of the main routes in the community.