Buchanan County, MO ZIP codes
There are 12 ZIP codes in Buchanan County, MO, in 6 towns, from 64401 to 64508. The largest are 64506 (Saint Joseph), 64507 (Saint Joseph) and 64503 (Saint Joseph). 2 more cross into it from neighbouring counties: 64454 and 64439.
The county seat is St. Joseph.
- ZIP codes
- 12
- Partly in it
- 2 more
- Towns
- 6
- County seat
- St. Joseph
- County FIPS
29021- State
- Missouri
- Population
- 83,568
- Median household income
- $62,158
- Land area
- 408 sq mi
- Metro area
- St. Joseph
Buchanan 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.
ZIP codes partly in Buchanan County
These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Buchanan County.
- 64439 Dearborn · mostly in Platte County
- 64454 Gower · mostly in Clinton County
Map of Buchanan County ZIP codes
The ZIP codes of Buchanan 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.
Buchanan County in numbers
About 83,568 people live in Buchanan County, in 33,439 households, the 14th most populous of Missouri's 115 counties. The median household income is $62,158 a year, 12% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $166,300 (28% below the Missouri median), and median gross rent is $902 a month. The median age is 38.9; 23.9% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 18 minutes.
| Population | 83,568 |
|---|---|
| Households | 33,439 |
| Median age | 38.9 |
| Median household income | $62,158 |
| Median home value | $166,300 |
| Median gross rent | $902 |
| Bachelor's degree or higher | 23.9% |
| Mean commute | 17.8 min |
| Population density | 205 / 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 Buchanan County
| Town | ZIP codes | Population |
|---|---|---|
| St. Joseph | 7 | 71,236 |
| Agency | 1 | 871 |
| De Kalb | 1 | 518 |
| Easton | 1 | 336 |
| Rushville | 1 | 260 |
| Faucett | 1 | 114 |
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 Buchanan County.
Not sure you are in Buchanan County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Buchanan County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
64401 | Agency , MO | Standard | 1,757 | $99,398 | $271,900 |
64440 | De Kalb , MO | Standard | 900 | $94,306 | $187,800 |
64443 | Easton , MO | Standard | 1,249 | $86,042 | $300,000 |
64448 | Faucett , MO | Standard | 912 | $76,058 | $258,500 |
64484 | Rushville , MO | Standard | 940 | $77,917 | $163,400 |
64501 | Saint Joseph , MO | Standard | 10,689 | $46,731 | $98,600 |
64502 | Saint Joseph , MO | No street area | — | — | — |
64503 | Saint Joseph , MO | Standard | 11,954 | $53,039 | $140,500 |
64504 | Saint Joseph , MO | Standard | 10,068 | $58,801 | $127,100 |
64506 | Saint Joseph , MO | Standard | 21,461 | $65,573 | $240,300 |
64507 | Saint Joseph , MO | Standard | 13,991 | $61,158 | $140,300 |
64508 | Saint Joseph , MO | No street area | — | — | — |
Cite this page
zipcodes.pro. “Buchanan County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/buchanan
Underlying data is public domain or openly licensed — sources, vintages and licences.