Buchanan County, Missouri ZIP codes
12 ZIP codes are in Buchanan County, plus 5 that cross in from neighboring counties. It's part of the St. Joseph, MO-KS metro area.
- ZIP codes
- 12
- Population in these ZIPs
- 73,921
- Avg. median income
- $60,800population-weighted
- Cities & towns
- 6
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Buchanan County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 64401 | Agency | 1,757 | $99,398 | $330,900 |
| 64440 | De Kalb | 900 | $94,306 | $311,800 |
| 64443 | Easton | 1,249 | $86,042 | $369,100 |
| 64448 | Faucett | 912 | $76,058 | $351,600 |
| 64484 | Rushville | 940 | $77,917 | $226,100 |
| 64501 | Saint Joseph | 10,689 | $46,731 | $125,500 |
| 64502 PO Box | Saint Joseph | — | — | — |
| 64503 | Saint Joseph | 11,954 | $53,039 | $171,800 |
| 64504 | Saint Joseph | 10,068 | $58,801 | $130,300 |
| 64506 | Saint Joseph | 21,461 | $65,573 | $278,600 |
| 64507 | Saint Joseph | 13,991 | $61,158 | $167,500 |
| 64508 PO Box | Saint Joseph | — | — | — |
ZIP codes partly in Buchanan County
These ZIP codes are mostly in a neighboring county but cover part of Buchanan County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 64439 | Dearborn | Platte County | 1,537 | $91,136 | $332,800 |
| 64444 | Edgerton | Platte County | 1,043 | $68,482 | $338,600 |
| 64454 | Gower | Clinton County | 2,941 | $87,262 | $315,100 |
| 64490 | Stewartsville | Clinton County | 1,939 | $88,750 | $271,500 |
| 64505 | Saint Joseph | Andrew County | 14,107 | $73,298 | $220,300 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Buchanan County
Nearby counties
Frequently asked questions
How many ZIP codes are in Buchanan County, Missouri?
12 ZIP codes are mainly in Buchanan County, and 5 more ZIP codes from neighboring areas reach partly into it.
What cities are in Buchanan County?
ZIP codes in Buchanan County use the city names Agency, De Kalb, Easton, Faucett, Rushville and Saint Joseph.
What metro area is Buchanan County in?
Buchanan County is part of the St. Joseph, MO-KS metropolitan statistical area.