Oswego, IL ZIP Code
Oswego, Illinois has one ZIP code: .
Mail addressed to Oswego covers nearby places too.
Where the 60543 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Oswego village limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Oswego
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
ZIP codes from nearby towns that reach into Oswego
- 60560, mailing town Yorkville, covers 5 percent of Oswego
Why your mail may say Oswego when you live outside it
Oswego ZIP codes also cover Oswego Township and Na-Au-Say Township, so a letter addressed to Oswego can go to a home outside the village limits.
The reverse happens too: parts of Oswego use 60560, which mails under a neighboring town's name.
A ZIP code does not set your city, school district or tax. Kendall County property records show which city you are in.
Oswego ZIP code questions
What is the main ZIP code for Oswego?
60543, the ZIP code of the main Oswego post office at 26 S Madison St.
What county is Oswego in?
Kendall County.
ZIP codes for towns near Oswego
More towns near Oswego: Woodridge, St. Charles, Wheaton, Downers Grove, Carol Stream, Bartlett, Glendale Heights, Lombard, Hanover Park.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections