Stillwater is a city located in Payne County Oklahoma. It is also the county seat of Payne County. With a 2020 population of 49,939, it is the 9th largest city in Oklahoma and the 790th largest city in the United States . Stillwater is currently declining at a rate of -0.36% annually but its population has increased by 9.30% since the most recent census, which recorded a population of 45,688 in 2010. Stillwater reached it's highest population of 50,479 in 2018. Spanning over 30 miles, Stillwater has a population density of 1,690 people per square mile.
The average household income in Stillwater is $57,823 with a poverty rate of 35.18%. The median rental costs in recent years comes to $832 per month, and the median house value is $184,900. The median age in Stillwater is 23.5 years, 23.1 years for males, and 23.9 years for females.