City · Illinois · United States
Grantsburg, IL — ZIP codes
1 ZIP code · Johnson County
- City
- Grantsburg
- County
- Johnson
- State
- Illinois
- Country
- United States
- Postal code
- 62943Single source
- Coordinates
- 37.3794, -88.7583 View on OpenStreetMap
- Area code
- 618 (from the nearest rate centre)
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 62943 | Grantsburg | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.