Oswego is located in Illinois. Oswego, Illinois has a population of 33,759. Oswego is more family-centric than the surrounding county with 49.27% of the households containing married families with children. The county average for households married with children is 43.85%.
The median household income in Oswego, Illinois is $101,191. The median household income for the surrounding county is $89,860 compared to the national median of $57,652. The median age of people living in Oswego is 34.8 years.
The average high temperature in July is 83.7 degrees, with an average low temperature in January of 13.8 degrees. The average rainfall is approximately 38 inches per year, with 26.6 inches of snow per year.