From a total population of 31,504, Oswego has a median age of 35.6. The average age of males, in Oswego, is 34.7 while the average age of females is 36.5. When you compare this to median age of Illinois, Oswego is 1.4 years younger.
The median income of individuals, in Oswego, is $33,114 while the average household income is $97,323. When comparing the median income of people living in Oswego to the rest of Illinois, the average income in Oswego is $3,095 more.