Oswego, Illinois

Oswego population, 2020 to 2024

Oswego added 4,034 residents from July 2020 to July 2024, a change of +11.6%. In the latest year it moved by +1,698. Among 330 Illinois places of 5,000 or more, that growth ranks 8th; the median place changed by -0.9%. The median place of 5,000+ in Illinois has 14,760 people, so Oswego is 2.6 times that size.

Oswego covers 15.83 square miles of land and 0.15 of water, for 2,450 people per square mile of land. The median Illinois place of 5,000+ has 2,177, so Oswego is denser than the typical town.

What county Oswego is in

All of Oswego's residents live in Kendall County, which had 143,171 residents in 2024. Oswego holds 27.1% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Oswego

1 ZIP Code Tabulation Area (ZCTA) overlaps Oswego by at least 10% of the ZCTA's or the village's land: 60543. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a village that annexed land after 2020 may reach into ZIP codes not listed here.

Where Oswego is

The Census internal point of Oswego is at 41.683200, -88.338800. Springfield, the capital, is 148.3 miles SSW in a straight line. The nearest larger place is Plainfield, IL (48,881 people), 6.0 miles away. The nearest city of 100,000 or more is Aurora, IL, 6.1 miles away.

Daylight in Oswego

At 41.68° N, Oswego gets about 15 h 12 min of daylight around the June solstice and 9 h 09 min around the December solstice, a swing of 6 h 03 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Oswego

The eight nearest incorporated places of 1,000+ in Illinois, measured between internal points. The closest is Montgomery, 2.8 miles away, with 21,957 people.