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
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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
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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).
Lemont village, IL Climate
Lemont village, IL has an average annual temperature of 9.7°C (49°F) and receives about 941 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.7°C
Avg Temp
941
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 22° | 41 mm |
| February | -3° / 27° | 38 mm |
| March | 3° / 38° | 67 mm |
| April | 9° / 49° | 98 mm |
| May | 15° / 59° | 95 mm |
| June | 21° / 69° | 103 mm |
| July | 23° / 74° | 97 mm |
| August | 22° / 72° | 101 mm |
| September | 18° / 64° | 91 mm |
| October | 11° / 53° | 69 mm |
| November | 4° / 40° | 78 mm |
| December | -2° / 28° | 63 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Lemont village, IL
The most comfortable months to visit Lemont village, IL are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). June is usually the wettest month.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.