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
Get Lemont's next ACS population data
Subscribe for Population Review updates by email. No spam, unsubscribe anytime.
Lemont covers 8.8 sq mi of land at 2000 people per square mile.
About Lemont, IL
The poverty rate is what most separates Lemont from the typical city: 1.5% of residents live below the federal poverty line, against 12.4% nationally. Lemont is a city in Illinois with a population of 17,643.
Median household income is $126,100, above the US median of $78,538. Hardship is rare relative to US cities: a poverty rate of just 1.5%, below the national 12.4%. The median home value is $447,800, with typical rent around $1,211.
Educational attainment is on the higher side for US cities — 45.6% of adults hold a four-year degree, above the national 35.0%. Remote work is close to the national 14.0% at 14.4%, and the average commute runs about 35 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).
Where to stay in Lemont
Visiting or relocating to Lemont, IL? Compare hotels and short-term rentals across the metro — live availability and prices.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
More from Illinois
Population 2,707,648
Population 179,867
Population 149,785
Population 149,424
Population 147,649
Full rankings of Illinois cities by population
Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.