Hainesville is a city located in Illinois. With a 2020 population of 3,509, it is the 394th largest city in Illinois and the 5771st largest city in the United States . Hainesville is currently declining at a rate of -0.68% annually and its population has decreased by -2.45% since the most recent census, which recorded a population of 3,597 in 2010. Hainesville reached it's highest population of 3,661 in 2010. Spanning over 2 miles, Hainesville has a population density of 1,900 people per square mile.
The average household income in Hainesville is $100,297 with a poverty rate of 1.71%. The median rental costs in recent years comes to $1,454 per month, and the median house value is $169,200. The median age in Hainesville is 34 years, 35.5 years for males, and 33.7 years for females.