| ZIP Codes: | 8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 816 / 975 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:40 PM |
| Population: | 12,188 [See All] |
| FIPS: | 29003 |
| CBSA: | St. Joseph, MO-KS |
| Land Area: | 358 sq mi |
| Water Area: | 3 sq mi |
| Coordinates: | 39.9858, -94.7958 |
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12,188 residents live across 8 ZIPs covering 358 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 12,057 to 12,188 from 2014 to 2024 — a +1.1% change. 4 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 64480 (Rea, $115,781 median) and poorest ZIP 64421 (Amazonia, $53,125) are 15.1 miles apart — a 2.2× income gap across local geography.
Median home values vary 2.9× across this county — from $89,200 in 64449 (Fillmore) to $256,700 in 64480 (Rea).
Density varies 8× across the county — from 10 people/sq mi in 64427 (Bolckow) to 75 in 64485 (Savannah).
Educational attainment ranges from 5.2% bachelor's+ in 64421 (Amazonia) to 50.7% in 64436 (Cosby) — the breadth of educational profiles across the area.
Within Missouri, this is the #78 most populous of 116 counties and ranks #13 for median household income .
Weighted by population, the typical household earns about $72,139 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.7% of adults age 25+ hold a bachelor's degree or higher (2,390 of 8,628 reporting).
8 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 64485 | Savannah | Standard | 7,998 | $67,929 | 107.1 | 1.8% |
| 64436 | Cosby | Standard | 873 | $113,500 | 31.6 | 0.5% |
| 64421 | Amazonia | Standard | 817 | $53,125 | 27.9 | 22.9% |
| 64483 | Rosendale | Standard | 591 | $73,750 | 34.8 | -11.8% |
| 64427 | Bolckow | Standard | 582 | $62,917 | 61.1 | -19.5% |
| 64459 | Helena | Standard | 507 | $78,808 | 22.2 | 19.6% |
| 64449 | Fillmore | Standard | 491 | $71,667 | 41.8 | -2.2% |
| 64480 | Rea | Standard | 329 | $115,781 | 30.9 | -6.3% |