Lake Zurich is a city located in Lake County Illinois. With a 2020 population of 19,651, it is the 125th largest city in Illinois and the 1890th largest city in the United States . Lake Zurich is currently declining at a rate of -0.57% annually but its population has increased by 0.10% since the most recent census, which recorded a population of 19,631 in 2010. Lake Zurich reached it's highest population of 20,030 in 2014. Spanning over 7 miles, Lake Zurich has a population density of 2,875 people per square mile.
The average household income in Lake Zurich is $141,089 with a poverty rate of 3.49%. The median rental costs in recent years comes to $1,562 per month, and the median house value is $337,300. The median age in Lake Zurich is 38.8 years, 37.1 years for males, and 40.4 years for females.