Fairmont is a city located in Martin County Minnesota. It is also the county seat of Martin County. With a 2020 population of 9,928, it is the 99th largest city in Minnesota and the 3124th largest city in the United States . Fairmont is currently declining at a rate of -0.51% annually and its population has decreased by -6.92% since the most recent census, which recorded a population of 10,666 in 2010. Fairmont reached it's highest population of 11,506 in 1980. Spanning over 17 miles, Fairmont has a population density of 661 people per square mile.
The average household income in Fairmont is $64,771 with a poverty rate of 18.43%. The median rental costs in recent years comes to $621 per month, and the median house value is $123,700. The median age in Fairmont is 44 years, 39.8 years for males, and 48.3 years for females.