With 7,919 people, Round Lake Park is a city in Illinois. The median age is 50.0, about 11 years above the US median. 87% of homes are owner-occupied. Four-year degrees are less common here than nationally, at 16% of adults. The typical home is worth $164,900. That trails the Illinois median by roughly 33%.
At a glance
Lower income
median household income $55,813, below the US median
US median: $82,259
Older
median age 50.0
US median: 38.9
Less educated
16% hold a bachelor's degree
US average: 36%
More affordable
home values down 25%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Round Lake Park
What changed most since 1990
Hispanic share12.8% → 49.5%(+36.7 pts)US over the same years: +9.9 pts
Median age28.4 → 50.0(+21.6 years)US over the same years: +6.0 years
White share87.0% → 43.9%(−43.2 pts)US over the same years: −17.8 pts
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)5.7%(35)
US avg: 26.4%
Gulf War (1990s)8%(49)
US avg: 24.3%
Vietnam era49.4%(301)
US avg: 33.1%
Korean War3.6%(22)
US avg: 4.5%
World War II1.5%(9)
US avg: 1%
Share of the 609 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Round Lake Park, decade by decade
Round Lake Park population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
4,045
$77,184
$160,085
5.3%
28.2
2000
6,038
$81,785
$219,509
11.2%
54.6
2010
7,505
$64,892
$236,213
14.5%
67.2
2020
7,680
$59,158
$145,566
12.8%
69.4
2024
7,919
$55,813
$164,900
16.5%
69.9
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
