Oswego
Oswego is significantly wealthier than the US average, with a median household income of $123,792. The city has more than doubled in size since 2000, adding 23,049 residents. Median home value has more than doubled since 2000, reaching $344,500. Poverty is rare here, at 2.6% of residents. It ranks in the top 5% of US cities for household income. Households here earn about 48% more than the Illinois median.
Population & growth
PEP 2025 EST:39,948 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
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Race & ethnicity
Education
Commute & transportation
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People & community
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How many people live in Oswego, Illinois?
Oswego, Illinois has about 36,375 residents according to the 2024 American Community Survey.
What is the median household income in Oswego, Illinois?
The typical household in Oswego, Illinois earns about $123,792 a year. Half of households make more than that, and half make less.
Is Oswego, Illinois expensive?
In Oswego, Illinois, the median home is worth about $344,500, and the typical rent is about $1,860 a month.
How educated are people in Oswego, Illinois?
About 44.3% of adults age 25 and over in Oswego, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Oswego, Illinois?
About 2.6% of people in Oswego, Illinois live below the federal poverty line.
Has Oswego, Illinois grown since 1990?
Yes, Oswego, Illinois has grown since 1990. The population has added about 32,499 residents, a change of about 838 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024