DuPage County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 2nd-largest in Illinois
The population of DuPage County, Illinois is 927,263 as of the 2023 American Community Survey, making it the 2nd-largest county in Illinois. The median household income is $110,502, the median home value is $374,100, and the median age is 40.0.
The population of DuPage County has grown 2.1% since 2010 (917,996 → 937,142), a +0.15% annualized rate.
927,263
Population
+0.15%
Annual growth
2828
People / sq mi
$110,502
Median Income
$374,100
Median Home Value
DuPage County covers 328 sq mi of land at 2828.3 people per square mile.
About DuPage County, IL
DuPage County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 2,828 people per square mile. With 927,263 residents, DuPage County is a county in Illinois. It is the #2-largest of all counties in Illinois nationally.
Households here are among the highest-earning of all US counties: median income is $110,502, above the US median of $78,538. Poverty is among the lowest of comparable US counties, at 4.6% — below the national 12.4%. Housing is expensive: the median home is worth $374,100, with typical rent around $1,628.
Degree attainment is near the top of the range for US counties: 51.4% of adults 25+ hold a bachelor’s, above the 35.0% national rate. An unusually large 19.4% of workers are remote, above the national 14.0%, and the average commute runs about 28 minutes each way.
That density explains much of the rest of the profile in DuPage County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
DuPage County Population History (2010-2024)
The county of DuPage County had a population of 917,996 in 2010 and 937,142 in 2024, a 2.1% growth over 14 years. The peak was 937,142 in 2024. Average annual growth rate: 0.15%.
937,142
Population (2024)
917,996
Population (2010)
937,142
Peak (2024)
0.15%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 917,996 |
| 2011 | 924,866 |
| 2012 | 928,719 |
| 2013 | 932,301 |
| 2014 | 933,480 |
| 2015 | 933,669 |
| 2016 | 931,408 |
| 2017 | 930,569 |
| 2018 | 927,808 |
| 2019 | 922,761 |
| 2020 | 931,508 |
| 2021 | 927,145 |
| 2022 | 925,143 |
| 2023 | 929,180 |
| 2024 | 937,142 |
Race & Ethnicity
| White | 67.2% |
| Black or African American | 5.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.0% |
| Two or More Races | 0.0% |
Age & Sex
40.0
Median Age
50.5%
Female
49.5%
Male
16.8%
Age 65+
Age Distribution
Children (under 15): 18.2% · Seniors (65+): 16.8%
Income & Poverty
| Median household income | $110,502+$28,800 vs state |
| Mean household income | $149,370 |
| Per-capita income | $57,051 |
| Poverty rate | 4.6%-3.6% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 65.0% |
Top Industries by Employment
The largest employment sector in DuPage County is professional & business services, accounting for 21.6% of workers.
How residents commute
4.5%
Drive alone
1.4%
Carpool
66.5%
Public transit
19.4%
Work from home
28.0 min
Avg commute
Housing
$374,100+$123,600 vs state
Median home value
$1,628
Median rent
73.1%
Homeownership rate
366,099
Total housing units
95.5%
Occupied
4.5%
Vacant
26.9%
Renter-occupied
Social & access
94.7%
With health insurance
97.1%
With broadband internet
15.7%
Foreign-born
3.6%
Veterans (18+)
8.4%
With a disability
70.6%
Speak language other than English at home
Education
93.2%
High School+
51.4%
Bachelor's+
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County rankings
Common questions about DuPage County, IL
Frequently Asked Questions
DuPage County, Illinois has a population of 927,263 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 2nd-largest county in Illinois. Population density is 2828 people per square mile.
The population of DuPage County has grown 2.1% since 2010 (917,996 → 937,142), a +0.15% annualized rate.
The median household income in DuPage County, Illinois is $110,502, with mean (average) household income of $149,370 and per-capita income of $57,051. 4.6% of residents live below the federal poverty level.
In DuPage County, the largest racial and ethnic groups are White (67.2%), Black or African American (5.0%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in DuPage County, Illinois is 40.0 years. Residents are 50.5% female and 49.5% male.
The median home value in DuPage County is $374,100 and median monthly rent is $1,628. 73.1% of occupied housing units are owner-occupied. The county has 366,099 total housing units, 4.5% of which are vacant.
The largest employment sector in DuPage County, Illinois is professional, scientific, and management services, employing 21.6% of workers. The unemployment rate is 3.3%.
Chicago is among the largest cities associated with DuPage County, Illinois, with a population of 2,707,648.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.