Brookfield is a city located in Cook County Illinois. With a 2020 population of 18,006, it is the 139th largest city in Illinois and the 2018th largest city in the United States . Brookfield is currently declining at a rate of -0.84% annually and its population has decreased by -5.12% since the most recent census, which recorded a population of 18,978 in 2010. Brookfield reached it's highest population of 20,429 in 1960. Spanning over 3 miles, Brookfield has a population density of 5,878 people per square mile.
The average household income in Brookfield is $95,568 with a poverty rate of 7.12%. The median rental costs in recent years comes to $1,029 per month, and the median house value is $245,200. The median age in Brookfield is 39.4 years, 39 years for males, and 39.6 years for females.