Round Lake, IL
Population 18,588 · Illinois
About Round Lake, IL
Round Lake is a mid-sized city in Illinois with a population of 18,588 residents. The median household income is $108,965 per year, which is above the national average. The median age in Round Lake is 36.7 years.
Housing in Round Lake has a median home value of $257,400 and median monthly rent of $1,494. Of the 6,569 total housing units, the majority are owner-occupied, with 4,979 owner-occupied and 1,292 renter-occupied units.
The unemployment rate in Round Lake is 6.4% and the poverty rate is 9.0%. 40.5% of residents hold a bachelor's degree or higher. The average commute time is 31.1 minutes.
Cost of Living in Round Lake, IL
Compared to national averages, Round Lake has a median household income of $108,965 (45% above the national median of $75,149). Home values average $257,400, which is 5% above the national median. Monthly rent at $1,494 is 28% above the US average of $1,163. Within Illinois, Round Lake's income is 45% above the state average of $75,072, and home values are 55% above the state median of $165,779.
Why Live in Round Lake, IL?
Round Lake offers a strong local economy with a median household income of $108,965, well above the national average, and a well-educated community where 40.5% of residents hold a bachelor’s degree or higher, and a low poverty rate of 9.0%, better than the national average.
Round Lake has a population of 18,588 with a median age of 36.7 years. Compare Round Lake with other cities to see how it stacks up, or explore all cities in Illinois.
Similar Cities Near Round Lake
Cities in Illinois with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Bensenville | 18,576 | $78,298 | $259,300 | Compare |
| Alsip | 18,650 | $67,557 | $208,700 | Compare |
| Matteson | 18,681 | $98,617 | $251,400 | Compare |
| Ottawa | 18,714 | $73,011 | $144,500 | Compare |
| North Aurora | 18,375 | $111,781 | $323,900 | Compare |
| Bellwood | 18,373 | $76,990 | $219,600 | Compare |
| East St. Louis | 18,278 | $30,992 | $52,700 | Compare |
| Sycamore | 18,243 | $80,837 | $254,200 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in Illinois
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Round Lake
What is the population of Round Lake, IL?
The population of Round Lake, IL is 18,588 according to the latest Census data.
What is the median household income in Round Lake?
The median household income in Round Lake, IL is $108,965 per year.
What is the median home value in Round Lake?
The median home value in Round Lake, IL is $257,400.
What is the average rent in Round Lake?
The median monthly rent in Round Lake, IL is $1,494.
What is the unemployment rate in Round Lake?
The unemployment rate in Round Lake, IL is 6.4%.