Lake in the Hills is a city located in McHenry County, Illinois. With a 2020 population of 28,879, it is the 69th largest city in Illinois and the 1329th largest city in the United States. Lake in the Hills is currently growing at a rate of 0.08% annually but its population has decreased by -0.30% since the most recent census, which recorded a population of 28,965 in 2010. Lake in the Hills reached it's highest population of 29,104 in 2012. Spanning over 10 miles, Lake in the Hills has a population density of 2,828 people per square mile.
The average household income in Lake in the Hills is $104,789 with a poverty rate of 4.92%. The median rental costs in recent years comes to $1,428 per month, and the median house value is $220,700. The median age in Lake in the Hills is 35.1 years, 34.8 years for males, and 35.3 years for females. For every 100 females there are 96.4 males.