Fairmont is a city in and the county seat of Martin County, Minnesota, United States. The population was 10,666 at the 2010 census.HistoryFairmont was platted in 1857. The city was so named on account of its elevated town site. A post office has been in operation at Fairmont since 1858. Fairmont was incorporated as a city in 1902.GeographyAccording to the United States Census Bureau, the city has a total area of 16.92sqmi, of which 15.04sqmi is land and 1.88sqmi is water. The city of Fairmont itself has been built around a chain of five lakes: Lake George, Sisseton Lake, Budd Lake, Hall Lake, and Amber Lake. All except Amber Lake are connected by channels and are used extensively for recreational boating and fishing. Interstate 90 and Minnesota State Highway 15 are two of the main routes in the city.Demographics2010 censusAs of the census of 2010, there were 10,666 people, 4,812 households, and 2,816 families residing in the city. The population density was 709.2PD/sqmi. There were 5,251 housing units at an average density of 349.1/sqmi. The racial makeup of the city was 95.6% White, 0.5% African American, 0.3% Native American, 0.7% Asian, 1.9% from other races, and 1.1% from two or more races. Hispanic or Latino of any race were 5.3% of the population.