Jefferson County, MO ZIP codes
Jefferson County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Jefferson County ZIP codes
The ZIP codes of Jefferson County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Jefferson County in numbers
About 229,458 people live in Jefferson County, in 88,309 households, the 7th most populous of Missouri's 115 counties. The median household income is $82,851 a year, 17% above the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $237,200 (about the same as the Missouri median), and median gross rent is $979 a month. The median age is 40.3; 24.7% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 31 minutes.
| Population | 229,458 |
|---|---|
| Households | 88,309 |
| Median age | 40.3 |
| Median household income | $82,851 |
| Median home value | $237,200 |
| Median gross rent | $979 |
| Bachelor's degree or higher | 24.7% |
| Mean commute | 30.6 min |
| Population density | 350 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Jefferson County
| Town | ZIP codes | Population |
|---|---|---|
| Arnold | 1 | 20,956 |
| House Springs | 1 | 13,436 |
| Festus | 1 | 13,201 |
| De Soto | 1 | 6,470 |
| Pevely | 1 | 6,055 |
| Barnhart | 1 | 5,785 |
| Imperial | 1 | 5,488 |
| Herculaneum | 1 | 5,071 |
| Dittmer | 1 | 5,002 |
| Crystal City | 1 | 4,718 |
| Fenton | 1 | 4,088 |
| High Ridge | 1 | 3,714 |
| Hillsboro | 1 | 3,500 |
| Cedar Hill | 1 | 1,261 |
| Kimmswick | 1 | 112 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Jefferson County.
- St. Louis County (51)
- Franklin County (20)
- St. Francois County (9)
- Washington County (10)
- Ste. Genevieve County (3)
Not sure you are in Jefferson County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Jefferson County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
63010 | Arnold , MO | Standard | 34,478 | $79,784 | $224,300 |
63012 | Barnhart , MO | Standard | 10,314 | $96,099 | $250,800 |
63016 | Cedar Hill , MO | Standard | 6,459 | $86,359 | $229,900 |
63019 | Crystal City , MO | Standard | 4,489 | $72,569 | $186,000 |
63020 | De Soto , MO | Standard | 20,166 | $70,824 | $185,900 |
63023 | Dittmer , MO | Standard | 5,002 | $79,583 | $212,800 |
63026 | Fenton , MO | Standard | 45,354 | $97,553 | $294,400 |
63028 | Festus , MO | Standard | 28,457 | $79,737 | $240,000 |
63047 | Hematite , MO | Standard | 0 | — | — |
63048 | Herculaneum , MO | Standard | 4,228 | $92,109 | $231,600 |
63049 | High Ridge , MO | Standard | 16,592 | $92,333 | $224,700 |
63050 | Hillsboro , MO | Standard | 18,744 | $87,371 | $288,200 |
63051 | House Springs , MO | Standard | 13,436 | $79,940 | $201,700 |
63052 | Imperial , MO | Standard | 28,712 | $92,922 | $285,400 |
63053 | Kimmswick , MO | Standard | 56 | $61,250 | $221,300 |
63057 | Liguori , MO | No street area | — | — | — |
63065 | Mapaville , MO | No street area | — | — | — |
63066 | Morse Mill , MO | No street area | — | — | — |
63070 | Pevely , MO | Standard | 8,428 | $65,211 | $210,500 |
Cite this page
zipcodes.pro. “Jefferson County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/jefferson
Underlying data is public domain or openly licensed — sources, vintages and licences.