Lemont, Illinois Demographics & Population 2026

Name: Lemont, Illinois Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

During the 2020–2024 ACS period, Lemont, Illinois had a total population of 17,820, the 145th largest village in Illinois, with a median household income of $123,370, which is 48% higher than the state average. The poverty rate is 3.1%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Key Takeaways

Household income is 48% above the state average — one of the wealthiest communities in Illinois.
An exceptionally low poverty rate of 3.1% — among the lowest in Illinois.
46.9% of adults hold a bachelor's degree or higher — top 10% in Illinois.

Lemont Quick Facts

Population 17,820

Median Household Income $123,370

Median Home Value $468,800

Poverty Rate 3.1%

Unemployment Rate 4.5%

Median Age 43.7 years

Homeownership Rate 87.6%

Affordability Ratio 3.8x

Bachelor's Degree or Higher 46.9%

High School Graduation Rate 95.7%

Diversity Index 28/100

Population 17,820 145th of 1,445

Median Income $123,370 top 10%

Poverty Rate 3.1% 75% lower than national

Median Home Value $468,800 top 10%

How Lemont Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	17,643	17,820	+1.0%
Median household income	$126,100	$123,370	-2.2%
Median home value	$447,800	$468,800	+4.7%

How Lemont Compares

Median Household Income

Lemont

$123,370

$83,390

National

$80,734

Median Home Value

Lemont

$468,800

$263,300

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 5.7%

$25K-$50K 11.7%

$50K-$100K 21.5%

$100K+ 61.1%

Detailed income brackets

Under $10K

3.3%

$10K-$15K

1.0%

$15K-$20K

0.5%

$20K-$25K

0.9%

$25K-$30K

1.2%

$30K-$35K

2.0%

$35K-$40K

2.3%

$40K-$45K

3.3%

$45K-$50K

2.9%

$50K-$60K

4.7%

$60K-$75K

7.4%

$75K-$100K

9.4%

$100K-$125K

11.4%

$125K-$150K

6.6%

$150K-$200K

19.7%

$200K+

23.5%

Employment

4.5% Unemployment Rate State: 5.8%|National: 5.2%

62.9% Labor Force Participation

Housing Overview

Owner 87.6%

Renter 12.4%

Affordability Index Affordable

3.8x home value to income ratio

Median gross rent $1,209/mo 11.8% of median household income annually

People & Demographics

Age Distribution

Under 18

25.0%

18-34

12.3%

35-54

27.0%

55-74

26.2%

75+

9.5%

Race & Ethnicity

Diversity Index

Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 61 | National average: 61

Education

Educational Attainment (Adults 25+)

Lemont Rankings in Illinois

#145 Population of 1,445

#104 Median Income of 1,374

#136 Education of 1,444

#50 Home Value of 1,372

Explore Illinois Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Other Cities in Cook County

City	Population	Median Income	Poverty	Home Value
Chicago	2,711,226	$77,902	16.8%	$334,100
Elgin	114,934	$90,282	9.8%	$273,000
Cicero	82,797	$70,842	14.6%	$249,400
Schaumburg	76,868	$97,514	5.7%	$330,400
Evanston	76,340	$96,434	11.8%	$481,200
Arlington Heights	76,005	$116,723	6.0%	$414,500
Palatine	66,293	$97,819	8.2%	$355,600
Skokie	66,219	$95,337	9.7%	$387,200
Des Plaines	59,156	$97,875	6.0%	$335,600
Orland Park	57,916	$98,910	7.3%	$367,200

Cities Similar to Lemont

These cities in the same state have comparable population and economic profiles.

City	Population	Median Income	Home Value	Bachelor's+	Poverty
Shorewood	18,343	$122,105	$337,800	41.1%	5.2%
Cary	17,923	$113,026	$309,800	44.7%	4.8%
North Aurora	18,696	$114,305	$342,100	40.5%	6.3%
Round Lake	18,628	$111,977	$278,600	41.5%	9.0%
Mokena	20,021	$123,889	$401,400	42.5%	4.5%

Population Overview

Lemont is a small city located in Illinois, within Cook County. The total population is 17,820. It ranks as the 145th most populous out of 1,445 Census-designated places in Illinois.

Age Demographics

The median age in Lemont is 43.7 years. This is 12% higher than the state median of 39.0 years.

Economy, Income & Housing

The median household income in Lemont is $123,370. This is 48% higher than the state median of $83,390. It is also 53% higher than the national median of $80,734. The poverty rate stands at 3.1%. This is 74% lower than the state poverty rate of 11.8%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 4.5%. This is 22% lower than the state rate of 5.8%. The median home value is $468,800. Housing costs are 78% higher than the state median of $263,300. The home-value-to-income ratio is 3.8x. 87.6% of occupied housing units are owner-occupied. This homeownership rate is 31% higher than the state average of 67.1%.

Race & Ethnicity

The largest racial or ethnic group in Lemont is White (non-Hispanic), making up 84.6% of the population. Hispanic or Latino residents account for 8.9%. The Black or African American population (1.7%) is well below the state average of 13.3%. The Hispanic or Latino population (8.9%) is well below the state average of 18.8%. The Asian population (2.8%) is well below the state average of 5.9%.

Education

46.9% of residents aged 25 and older hold a bachelor's degree or higher. This places Lemont in the top 10% of all cities in the state for educational attainment. This is 24% higher than the state rate of 37.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.7%. Notably, 19.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Lemont, Illinois is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Illinois state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,445 Census-designated places in Illinois. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.

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Frequently Asked Questions

What is the population of Lemont, Illinois?

Lemont, Illinois has a population of 17,820 according to the most recent U.S. Census ACS 5-Year Estimates.

What is the median household income in Lemont, IL?

The median household income in Lemont is $123,370, which is 53% higher than the national median of $80,734.

What is the poverty rate in Lemont, IL?

The poverty rate in Lemont is 3.1%. This means approximately 541 residents live below the federal poverty line.

What is the racial makeup of Lemont, Illinois?

Lemont's population is 84.6% White, 1.7% Black, 8.9% Hispanic/Latino, and 2.8% Asian.

What is the median home value in Lemont, IL?

The median home value in Lemont is $468,800. The home-value-to-income ratio is 3.8x.

How educated is Lemont, Illinois?

46.9% of adults (25+) in Lemont hold a bachelor's degree or higher, and 19.6% hold a graduate or professional degree.