
Oswego
- County:
- Kendall County
- County Seat:
- No
- Area (mi²):
- 15.198
- State:
- Illinois
Oswego is a village located in Kendall County, Illinois. Oswego has a 2025 population of 38,640. Oswego is currently growing at a rate of 2.07% annually and its population has increased by 11.28% since the most recent census, which recorded a population of 34,724 in 2020.
The average household income in Oswego is $134,326 with a poverty rate of 2.26%. The median age in Oswego is 39.7 years: 38.2 years for males, and 40.2 years for females.