Jefferson County ZIP Codes
Jefferson County is a county of Missouri.
- ZIP codes
- 20
- Cities & towns
- 20
- Area codes
- 5
- Land area
- 656 sq mi
Every ZIP code in Jefferson County
| ZIP code | City |
|---|---|
| 63010 | Arnold |
| 63012 | Barnhart |
| 63016 | Cedar Hill |
| 63019 | Crystal City |
| 63020 | De Soto |
| 63023 | Dittmer |
| 63028 | Festus |
| 63030 | Fletcher |
| 63041 | Grubville |
| 63047 | Hematite |
| 63048 | Herculaneum |
| 63049 | High Ridge |
| 63050 | Hillsboro |
| 63051 | House Springs |
| 63052 | Imperial |
| 63053 | Kimmswick |
| 63057 | Liguori |
| 63065 | Mapaville |
| 63066 | Morse Mill |
| 63070 | Pevely |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Jefferson County codes above are listed without a column we would have to invent.
Cities and towns in Jefferson County
A further 12 places in Jefferson County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.
Area codes covering Jefferson County
Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.
Where Jefferson County's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Scope every ZIP code recorded in Jefferson County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated . The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.