Mundelein is a city located in Lake County, Illinois. With a 2020 population of 31,062, it is the 60th largest city in Illinois and the 1247th largest city in the United States. Mundelein is currently declining at a rate of -0.28% annually and its population has decreased by -0.01% since the most recent census, which recorded a population of 31,064 in 2010. Mundelein reached it's highest population of 31,488 in 2015. Spanning over 10 miles, Mundelein has a population density of 3,258 people per square mile.
The average household income in Mundelein is $108,393 with a poverty rate of 5.91%. The median rental costs in recent years comes to $1,367 per month, and the median house value is $239,300. The median age in Mundelein is 36.6 years, 35.6 years for males, and 38 years for females. For every 100 females there are 101.4 males.