Freeport is a city located in Stephenson County Illinois. It is also the county seat of Stephenson County. With a 2020 population of 23,433, it is the 100th largest city in Illinois and the 1642nd largest city in the United States . Freeport is currently declining at a rate of -0.72% annually and its population has decreased by -8.60% since the most recent census, which recorded a population of 25,638 in 2010. Freeport reached it's highest population of 27,736 in 1970. Spanning over 12 miles, Freeport has a population density of 2,011 people per square mile.
The average household income in Freeport is $53,326 with a poverty rate of 17.80%. The median rental costs in recent years comes to $653 per month, and the median house value is $72,100. The median age in Freeport is 41.6 years, 40.1 years for males, and 44.2 years for females.