Oswego, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Oswego, Illinois is 35,463 as of the 2023 American Community Survey, making it the 52nd-largest city in Illinois. The median household income is $119,881, the median home value is $319,000, and the median age is 39.7.
The population has grown 26.5% since 2010 (30,659 → 38,778).
35,463
Population
2241
People / sq mi
$119,881
Median Income
$319,000
Median Home Value
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Oswego covers 15.8 sq mi of land at 2241 people per square mile.
About Oswego, IL
The poverty rate is what most separates Oswego from the typical city: 1.3% of residents live below the federal poverty line, against 12.4% nationally. With 35,463 residents, Oswego is a city in Illinois.
Median household income is $119,881, above the US median of $78,538. Very few residents live in poverty — 1.3%, below the national 12.4%. Homes carry a median value of $319,000, with typical rent around $1,823.
43.5% of adults 25 and older hold a bachelor’s degree, above the national average of 35.0%. A solid 16.2% of workers are based at home, above the national 14.0%, and the average commute runs about 31 minutes each way.
Oswego village Population History (2010-2024)
The city of Oswego village had a population of 30,659 in 2010 and 38,778 in 2024, a 26.5% growth over 14 years. The peak was 38,778 in 2024. Average annual growth rate: 1.71%.
38,778
Population (2024)
30,659
Population (2010)
38,778
Peak (2024)
1.71%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 30,659 |
| 2011 | 31,232 |
| 2012 | 31,806 |
| 2013 | 32,339 |
| 2014 | 33,238 |
| 2015 | 33,956 |
| 2016 | 34,463 |
| 2017 | 34,837 |
| 2018 | 35,183 |
| 2019 | 36,252 |
| 2020 | 34,744 |
| 2021 | 35,356 |
| 2022 | 35,952 |
| 2023 | 37,080 |
| 2024 | 38,778 |
Race & Ethnicity
| White | 68.7% |
| Black or African American | 12.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.8% |
| Two or More Races | 0.0% |
Economy & Income
$119,881
Median Household Income
$46,279
Per Capita Income
1.3%
Poverty Rate
1.9%
Unemployment Rate
Housing
$319,000
Median Home Value
$1,823
Median Rent
87.7%
Owner-Occupied
Education
94.8%
High School+
43.5%
Bachelor's+
Commute
0.6%
Drive Alone
73.1%
Public Transit
16.2%
Work From Home
30.5 min
Avg Commute
Community Profile
15.7%
Foreign Born
79.0%
Non-English at Home
4.0%
Veterans
7.0%
With Disability
96.4%
Health Insurance
98.8%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 28.0% |
| Manufacturing | 10.2% |
| Finance, Insurance & Real Estate | 8.7% |
| Information | 8.3% |
| Education, Health Care & Social Services | 6.2% |
| Retail Trade | 5.9% |
| Construction | 5.8% |
| Public Administration | 3.8% |
| Arts, Entertainment & Food Services | 3.4% |
| Transportation & Warehousing | 2.4% |
| Agriculture & Mining | 0.1% |
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Frequently Asked Questions
Oswego, Illinois has a population of 35,463 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 52nd-largest city in Illinois.
The median household income in Oswego, Illinois is $119,881, with 1.3% of residents living below the federal poverty level.
The median home value in Oswego, Illinois is $319,000, with median monthly rent at $1,823 and a homeownership rate of 87.7%.
The median age in Oswego, Illinois is 39.7 years. The population is 48.4% male and 51.6% female.
The population has grown 26.5% since 2010 (30,659 → 38,778).
Where to stay in Oswego
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.