Fox River Grove is a city located in McHenry County Illinois. With a 2020 population of 4,511, it is the 347th largest city in Illinois and the 5063rd largest city in the United States . Fox River Grove is currently declining at a rate of -0.68% annually and its population has decreased by -7.07% since the most recent census, which recorded a population of 4,854 in 2010. Fox River Grove reached it's highest population of in . Spanning over 2 miles, Fox River Grove has a population density of 2,635 people per square mile.
The average household income in Fox River Grove is $129,090 with a poverty rate of 3.87%. The median rental costs in recent years comes to $1,066 per month, and the median house value is $248,600. The median age in Fox River Grove is 37.9 years, 33.5 years for males, and 40.9 years for females.