Oswego /ɒsˈwiːɡoʊ/ is a village in Kendall County, Illinois, United States. The village population as of the 2010 census was 30,355, more than double its population of 13,326 in 2000. Oswego is the largest municipality located completely within Kendall County.
Oswego is located in northeastern Kendall County on the Fox River. It is bordered to the north by Boulder Hill and Montgomery, to the east by Aurora, and to the west by Yorkville, the Kendall county seat.
According to the 2010 census, the village of Oswego has a total area of 15.63 square miles (40.5 km), of which 15.53 square miles (40.2 km) (or 99.36%) is land and 0.11 square miles (0.28 km) (or 0.70%) is water.
As of the census of 2010, there are 30,355 people, 9,935 households, and 8,027 families residing in the village. The population density is 2,025/mi² (782/km²). There are 10,388 housing units at an urban density of 668.9/mi² (258.3/km²). The racial makeup of the village is 85.65% White, 5.16% African American, 0.24% Native American, 3.43% Asian, 0.03% Pacific Islander, 3.24% from other races, and 2.24% from two or more races. 11.71% of the population are Hispanic or Latino of any race.
There are 9,935 households out of which 50.3% have children under the age of 18 living with them, 69.2% are married couples living together, 10.58% have a female householder with no husband present, and 19.2% are non-families. The average household size is 3.08 and the average family size is 3.43.
In the village, the population is spread out with 34.7% under the age of 20, 17.0% from 20 to 34, 33.2% from 35 to 54, 8.3% from 55 to 64, and 6.8% who are 65 years of age or older. The median age is 33.9 years.
As of the 2000 census, the median income for a household in the village is $71,502, and the median income for a family is $75,929. Males have a median income of $55,580 versus $32,484 for females. The per capita income for the village is $27,204. 2.8% of the population and 1.6% of families are below the poverty line. Out of the total population, 3.4% of those under the age of 18 and 3.8% of those 65 and older are living below the poverty line.