Algonquin is a city located in McHenry County Illinois. Algonquin has a 2020 population of 87,491. Algonquin is currently growing at a rate of 0.07% annually but its population has decreased by -1.15% since the most recent census, which recorded a population of 88,508 in 2010. Algonquin reached it's highest population of 88,508 in 2010.
The average household income in Algonquin is $107,643 with a poverty rate of 5.88%. The median rental costs in recent years comes to $1,331 per month, and the median house value is $220,800. The median age in Algonquin is 40.1 years, 39.4 years for males, and 40.7 years for females.