Spring Grove is a city located in McHenry County Illinois. With a 2020 population of 5,680, it is the 308th largest city in Illinois and the 4424th largest city in the United States . Spring Grove is currently declining at a rate of -0.23% annually and its population has decreased by -1.70% since the most recent census, which recorded a population of 5,778 in 2010. Spring Grove reached it's highest population of 5,783 in 2010. Spanning over 9 miles, Spring Grove has a population density of 638 people per square mile.
The average household income in Spring Grove is $141,151 with a poverty rate of 1.14%. The median rental costs in recent years comes to - per month, and the median house value is $302,700. The median age in Spring Grove is 44.2 years, 46 years for males, and 43.4 years for females.