| ZIP Codes: | 9 ZIP Codes (7 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 620 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:10 PM |
| Population: | 18,632 [See All] |
| FIPS: | 20021 |
| CBSA: | Joplin, MO-KS |
| Land Area: | 447 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 37.1560, -94.7633 |
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18,632 residents live across 9 ZIPs covering 447 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 20,631 to 18,632 from 2014 to 2024 — a -9.7% change. 1 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 66770 (Riverton, $90,521 median) and poorest ZIP 66782 (West Mineral, $36,458) are 18.0 miles apart — a 2.5× income gap across local geography.
Median home values vary 3.3× across this county — from $45,000 in 66782 (West Mineral) to $149,100 in 66770 (Riverton).
Density varies 8× across the county — from 17 people/sq mi in 66773 (Scammon) to 141 in 66770 (Riverton).
Educational attainment ranges from 1.7% bachelor's+ in 66782 (West Mineral) to 30.5% in 66770 (Riverton) — the breadth of educational profiles across the area.
Within Kansas, this is the #28 most populous of 106 counties and ranks #97 for median household income .
Weighted by population, the typical household earns about $56,318 across the county — reflecting what a typical resident sees, not a simple ZIP average.
19.8% of adults age 25+ hold a bachelor's degree or higher (2,544 of 12,858 reporting).
7 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 |
|---|---|---|---|---|---|---|
| 66713 | Baxter Springs | Standard | 5,635 | $61,250 | 58.6 | 0.4% |
| 66739 | Galena | Standard | 5,025 | $52,289 | 70.4 | -11.8% |
| 66725 | Columbus | Standard | 4,991 | $48,443 | 232.6 | -11.8% |
| 66781 | Weir | Standard | 1,183 | $58,400 | 42.2 | -5.2% |
| 66770 | Riverton | Standard | 1,047 | $90,521 | 7.4 | -18.0% |
| 66773 | Scammon | Standard | 587 | $50,764 | 34.1 | -34.5% |
| 66782 | West Mineral | PO Box | 164 | $36,458 | 1.3 | -23.7% |
| 66778 | Treece | Standard | 0 | — | 0.0 | -100.0% |
| 66728 | Crestline | PO Box | — | — | 0.0 | — |