Will County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 4th-largest in Illinois
The population of Will County, Illinois is 698,450 as of the 2023 American Community Survey, making it the 4th-largest county in Illinois. The median household income is $107,799, the median home value is $298,000, and the median age is 38.9.
The population of Will County has grown 4.4% since 2010 (678,829 → 708,583), a +0.31% annualized rate.
698,450
Population
+0.31%
Annual growth
836
People / sq mi
$107,799
Median Income
$298,000
Median Home Value
Will County covers 836 sq mi of land at 835.6 people per square mile.
About Will County, IL
Will County is a county in Illinois with a population of 698,450. It ranks #4 among counties in Illinois by population. The median age is 38.9, in line with the national median. The population is 49.9% male and 50.1% female.
The median household income in Will County is $107,799, above the US median of $74,580. 5.2% of residents live below the federal poverty level. Home values sit at a median of $298,000, with monthly rent averaging $1,413. The homeownership rate of 82.5% is higher than the national rate of 64.8%.
Educational attainment in Will County reflects 36.5% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 13.3% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 31.7 minutes each way.
Will County Population History (2010-2024)
The county of Will County had a population of 678,829 in 2010 and 708,583 in 2024, a 4.4% growth over 14 years. The peak was 708,583 in 2024. Average annual growth rate: 0.31%.
708,583
Population (2024)
678,829
Population (2010)
708,583
Peak (2024)
0.31%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 678,829 |
| 2011 | 680,813 |
| 2012 | 682,459 |
| 2013 | 683,720 |
| 2014 | 685,123 |
| 2015 | 685,825 |
| 2016 | 688,330 |
| 2017 | 690,356 |
| 2018 | 690,934 |
| 2019 | 690,176 |
| 2020 | 696,909 |
| 2021 | 699,327 |
| 2022 | 699,110 |
| 2023 | 703,383 |
| 2024 | 708,583 |
Race & Ethnicity
| White | 65.0% |
| Black or African American | 11.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.0% |
Age & Sex
38.9
Median Age
50.1%
Female
49.9%
Male
14.2%
Age 65+
Age Distribution
Children (under 15): 19.2% · Seniors (65+): 14.2%
Income & Poverty
| Median household income | $107,799+$26,097 vs state |
| Mean household income | $131,203 |
| Per-capita income | $46,216 |
| Poverty rate | 5.2%-3.0% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 65.2% |
Top Industries by Employment
The largest employment sector in Will County is professional & business services, accounting for 21.9% of workers.
How residents commute
2.4%
Drive alone
0.8%
Carpool
74.3%
Public transit
13.3%
Work from home
31.7 min
Avg commute
Housing
$298,000+$47,500 vs state
Median home value
$1,413
Median rent
82.5%
Homeownership rate
252,684
Total housing units
95.5%
Occupied
4.5%
Vacant
17.5%
Renter-occupied
Social & access
94.7%
With health insurance
96.6%
With broadband internet
13.0%
Foreign-born
4.9%
Veterans (18+)
9.7%
With a disability
78.3%
Speak language other than English at home
Education
91.5%
High School+
36.5%
Bachelor's+
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County rankings
Common questions about Will County, IL
Frequently Asked Questions
Will County, Illinois has a population of 698,450 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 4th-largest county in Illinois. Population density is 836 people per square mile.
The population of Will County has grown 4.4% since 2010 (678,829 → 708,583), a +0.31% annualized rate.
The median household income in Will County, Illinois is $107,799, with mean (average) household income of $131,203 and per-capita income of $46,216. 5.2% of residents live below the federal poverty level.
In Will County, the largest racial and ethnic groups are White (65.0%), Black or African American (11.8%), Hispanic or Latino (1.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Will County, Illinois is 38.9 years. Residents are 50.1% female and 49.9% male.
The median home value in Will County is $298,000 and median monthly rent is $1,413. 82.5% of occupied housing units are owner-occupied. The county has 252,684 total housing units, 4.5% of which are vacant.
The largest employment sector in Will County, Illinois is professional, scientific, and management services, employing 21.9% of workers. The unemployment rate is 3.3%.
Chicago is among the largest cities associated with Will 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.