Island Lake is a city located in Lake County Illinois. With a 2020 population of 7,960, it is the 255th largest city in Illinois and the 3643rd largest city in the United States . Island Lake is currently declining at a rate of -0.38% annually and its population has decreased by -1.49% since the most recent census, which recorded a population of 8,080 in 2010. Island Lake reached it's highest population of 8,153 in 2000. Spanning over 4 miles, Island Lake has a population density of 2,377 people per square mile.
The average household income in Island Lake is $92,806 with a poverty rate of 6.16%. The median rental costs in recent years comes to $1,388 per month, and the median house value is $171,100. The median age in Island Lake is 42.6 years, 40.6 years for males, and 44.5 years for females.