Romeoville is a city located in Will County Illinois. With a 2020 population of 40,086, it is the 39th largest city in Illinois and the 979th largest city in the United States . Romeoville is currently growing at a rate of 0.43% annually and its population has increased by 1.02% since the most recent census, which recorded a population of 39,680 in 2010. Romeoville reached it's highest population of 40,086 in 2021. Spanning over 20 miles, Romeoville has a population density of 2,102 people per square mile.
The average household income in Romeoville is $88,546 with a poverty rate of 6.96%. The median rental costs in recent years comes to $1,552 per month, and the median house value is $186,100. The median age in Romeoville is 34.6 years, 33.3 years for males, and 35.8 years for females.