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+
Largest cities in Illinois
Other counties in Illinois
Part of Illinois
Metro areas in Illinois
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.
DuPage County, IL Climate
DuPage County, IL has an average annual temperature of 9.6°C (49°F) and receives about 935 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.6°C
Avg Temp
935
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 22° | 41 mm |
| February | -3° / 26° | 36 mm |
| March | 3° / 37° | 65 mm |
| April | 9° / 48° | 96 mm |
| May | 15° / 60° | 94 mm |
| June | 21° / 69° | 104 mm |
| July | 23° / 74° | 98 mm |
| August | 22° / 72° | 105 mm |
| September | 18° / 64° | 94 mm |
| October | 11° / 53° | 66 mm |
| November | 4° / 39° | 77 mm |
| December | -3° / 27° | 59 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 DuPage County, IL
The most comfortable months to visit DuPage County, IL are typically June, August and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -10°C low). August is usually the wettest month.
Where to stay near DuPage County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.