| ZIP Codes: | 13 ZIP Codes (11 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 816 / 975 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:59 PM |
| Population: | 88,028 [See All] |
| FIPS: | 29021 |
| CBSA: | St. Joseph, MO-KS |
| Land Area: | 414 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 39.7088, -94.8289 |
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88,028 residents live across 13 ZIPs covering 414 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 93,346 to 88,028 from 2014 to 2024 — a -5.7% change. 4 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 64401 (Agency, $99,398 median) and poorest ZIP 64501 (Saint Joseph, $46,731) are 11.0 miles apart — a 2.1× income gap across local geography.
Median home values vary 3.0× across this county — from $98,600 in 64501 (Saint Joseph) to $300,000 in 64443 (Easton).
Density varies 216× across the county — from 13 people/sq mi in 64484 (Rushville) to 2,772 in 64501 (Saint Joseph).
Educational attainment ranges from 9.0% bachelor's+ in 64440 (De Kalb) to 32.6% in 64506 (Saint Joseph) — the breadth of educational profiles across the area.
Within Missouri, this is the #14 most populous of 116 counties and ranks #27 for median household income .
Weighted by population, the typical household earns about $62,844 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.1% of adults age 25+ hold a bachelor's degree or higher (14,538 of 60,246 reporting). The most-educated ZIPs cluster around Saint Joseph.
11 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 64506 | Saint Joseph | Standard | 21,461 | $65,573 | 10.0 | -12.7% |
| 64505 | Saint Joseph | Standard | 14,107 | $73,298 | 46.4 | 6.5% |
| 64507 | Saint Joseph | Standard | 13,991 | $61,158 | 56.1 | -1.8% |
| 64503 | Saint Joseph | Standard | 11,954 | $53,039 | 9.7 | -6.6% |
| 64501 | Saint Joseph | Standard | 10,689 | $46,731 | 3.9 | -11.1% |
| 64504 | Saint Joseph | Standard | 10,068 | $58,801 | 48.9 | -8.5% |
| 64401 | Agency | Standard | 1,757 | $99,398 | 37.3 | 13.6% |
| 64443 | Easton | Standard | 1,249 | $86,042 | 49.1 | 1.7% |
| 64484 | Rushville | Standard | 940 | $77,917 | 73.3 | -13.3% |
| 64448 | Faucett | Standard | 912 | $76,058 | 39.6 | -7.5% |
| 64440 | De Kalb | Standard | 900 | $94,306 | 39.9 | 45.6% |
| 64502 | Saint Joseph | PO Box | — | — | 0.0 | — |
| 64508 | Saint Joseph | PO Box | — | — | 0.0 | — |