City · Indiana · United States
Saint John, IN — ZIP codes
1 ZIP code · Lake County
- City
- Saint John
- County
- Lake
- State
- Indiana
- Country
- United States
- Postal code
- 46373Single source
- Coordinates
- 41.4495, -87.4764 View on OpenStreetMap
- Area code
- 219
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 46373 | Saint John | 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.