Thief River Falls is a city located in Minnesota. With a 2020 population of 8,862, it is the 107th largest city in Minnesota and the 3335th largest city in the United States. Thief River Falls is currently growing at a rate of 0.33% annually and its population has increased by 3.37% since the most recent census, which recorded a population of 8,573 in 2010. Thief River Falls reached it's highest population of 9,105 in 1980. Spanning over 6 miles, Thief River Falls has a population density of 1,566 people per square mile.
The average household income in Thief River Falls is $61,627 with a poverty rate of 11.77%. The median rental costs in recent years comes to $691 per month, and the median house value is $122,000. The median age in Thief River Falls is 39.2 years, 33.7 years for males, and 43.2 years for females. For every 100 females there are 97.5 males.