Lemont, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Lemont, Illinois is 17,643 as of the 2023 American Community Survey, making it the 145th-largest city in Illinois. The median household income is $126,100, the median home value is $447,800, and the median age is 43.7.
The population has grown 13.3% since 2010 (16,073 → 18,203).
17,643
Population
2000
People / sq mi
$126,100
Median Income
$447,800
Median Home Value
Lemont covers 8.8 sq mi of land at 2000 people per square mile.
About Lemont, IL
Lemont is a city in Illinois with a population of 17,643. It ranks #145 among cities in Illinois by population. The median age is 43.7, older than the national median. The population is 51.2% male and 48.8% female.
The median household income in Lemont is $126,100, above the US median of $74,580. 1.5% of residents live below the federal poverty level. Home values sit at a median of $447,800, with monthly rent averaging $1,211. The homeownership rate of 87.2% is higher than the national rate of 64.8%.
Educational attainment in Lemont reflects 45.6% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 14.4% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 35.3 minutes each way.
Lemont village Population History (2010-2024)
The city of Lemont village had a population of 16,073 in 2010 and 18,203 in 2024, a 13.3% growth over 14 years. The peak was 18,203 in 2024. Average annual growth rate: 0.90%.
18,203
Population (2024)
16,073
Population (2010)
18,203
Peak (2024)
0.90%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 16,073 |
| 2011 | 16,217 |
| 2012 | 16,335 |
| 2013 | 16,499 |
| 2014 | 16,644 |
| 2015 | 16,764 |
| 2016 | 16,952 |
| 2017 | 17,040 |
| 2018 | 17,136 |
| 2019 | 17,291 |
| 2020 | 17,802 |
| 2021 | 17,670 |
| 2022 | 17,689 |
| 2023 | 17,731 |
| 2024 | 18,203 |
Race & Ethnicity
| White | 88.2% |
| Black or African American | 1.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Economy & Income
$126,100
Median Household Income
$53,572
Per Capita Income
1.5%
Poverty Rate
2.8%
Unemployment Rate
Housing
$447,800
Median Home Value
$1,211
Median Rent
87.2%
Owner-Occupied
Education
95.5%
High School+
45.6%
Bachelor's+
Commute
2.7%
Drive Alone
76.3%
Public Transit
14.4%
Work From Home
35.3 min
Avg Commute
Community Profile
10.5%
Foreign Born
74.5%
Non-English at Home
4.8%
Veterans
9.4%
With Disability
98.0%
Health Insurance
96.6%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.4% |
| Finance, Insurance & Real Estate | 12.6% |
| Information | 9.8% |
| Retail Trade | 8.0% |
| Construction | 7.9% |
| Education, Health Care & Social Services | 7.7% |
| Manufacturing | 6.9% |
| Public Administration | 6.7% |
| Arts, Entertainment & Food Services | 5.1% |
| Transportation & Warehousing | 0.8% |
| Agriculture & Mining | 0.3% |
Largest cities in Illinois
Largest counties in Illinois
Part of Illinois
Metro areas in Illinois
City rankings
Frequently Asked Questions
Lemont, Illinois has a population of 17,643 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 145th-largest city in Illinois.
The median household income in Lemont, Illinois is $126,100, with 1.5% of residents living below the federal poverty level.
The median home value in Lemont, Illinois is $447,800, with median monthly rent at $1,211 and a homeownership rate of 87.2%.
The median age in Lemont, Illinois is 43.7 years. The population is 51.2% male and 48.8% female.
The population has grown 13.3% since 2010 (16,073 → 18,203).
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.