Stillwater is a city located in Washington County Minnesota. It is also the county seat of Washington County. With a 2020 population of 20,131, it is the 59th largest city in Minnesota and the 1843rd largest city in the United States . Stillwater is currently growing at a rate of 1.27% annually and its population has increased by 10.46% since the most recent census, which recorded a population of 18,225 in 2010. Stillwater reached it's highest population of 20,131 in 2021. Spanning over 9 miles, Stillwater has a population density of 2,501 people per square mile.
The average household income in Stillwater is $120,625 with a poverty rate of 4.94%. The median rental costs in recent years comes to $1,014 per month, and the median house value is $291,400. The median age in Stillwater is 41.6 years, 41.1 years for males, and 42.1 years for females.