Hudson is a city in St. Croix County, Wisconsin, United States. As of the 2010 United States Census, its population was 18,937, making it the principal and largest city of the Minneapolis - St. Paul metropolitan area (Wisconsin suburbs). The Hudson area however had a population of 39,713. The village of North Hudson is located directly to the north of Hudson.
Hudson was settled in the summer of 1840 by Louis Massey and his brother in-law, Peter Bouchea. William Steets arrived at about the same time. Later that same year, Joseph Sauperson (commonly known as Joe LaGrue) took up residence. These four are considered Hudson's original inhabitants. Massey and Bouchea settled at the mouth of the Willow River, near the present-day First and St. Croix Streets. They had been part of the group who lived for some time along the river below Fort Snelling, which appears on some old maps as "Massey's Landing". The 1840s saw a few settlers making their appearance here — Captain John Page, the Nobles brothers, Dr. Philip Aldrich, Ammah Andrews, Moses Perrin, Colonel James Hughes, Daniel Anderson, and others.
Hudson was at first called Willow River and later named Buena Vista by Judge Joel Foster, founder of River Falls, after returning from the Mexican War where he fought in the Battle of Buena Vista. Alfred Day petitioned for the name Hudson because of his impression of the similarity between bluffs along the river and the Hudson River in his native New York.