| ZIP Codes: | 8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 785 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:12 PM |
| Population: | 27,146 [See All] |
| FIPS: | 20059 |
| CBSA: | Ottawa, KS |
| Land Area: | 623 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 38.5309, -95.2482 |
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27,146 residents live across 8 ZIPs covering 623 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 26,560 to 27,146 from 2014 to 2024 — a +2.2% change. 6 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 66080 (Richmond, $90,543 median) and poorest ZIP 66079 (Rantoul, $54,432) are 12.9 miles apart — a 1.7× income gap across local geography.
Median home values vary 1.5× across this county — from $164,000 in 66079 (Rantoul) to $241,700 in 66092 (Wellsville).
Density varies 13× across the county — from 8 people/sq mi in 66095 (Williamsburg) to 97 in 66067 (Ottawa).
Educational attainment ranges from 11.2% bachelor's+ in 66042 (Lane) to 36.3% in 66078 (Princeton) — the breadth of educational profiles across the area.
Within Kansas, this is the #22 most populous of 106 counties and ranks #25 for median household income .
Weighted by population, the typical household earns about $78,078 across the county — reflecting what a typical resident sees, not a simple ZIP average.
24.2% of adults age 25+ hold a bachelor's degree or higher (4,466 of 18,429 reporting).
8 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
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 |
|---|---|---|---|---|---|---|
| 66067 | Ottawa | Standard | 16,330 | $77,255 | 167.7 | 0.6% |
| 66092 | Wellsville | Standard | 4,351 | $87,524 | 86.6 | 4.3% |
| 66076 | Pomona | Standard | 2,416 | $73,945 | 91.1 | 24.5% |
| 66080 | Richmond | Standard | 980 | $90,543 | 62.8 | 14.2% |
| 66042 | Lane | Standard | 929 | $67,813 | 31.8 | 62.1% |
| 66078 | Princeton | Standard | 805 | $80,000 | 63.5 | -20.9% |
| 66079 | Rantoul | Standard | 752 | $54,432 | 44.2 | 40.0% |
| 66095 | Williamsburg | Standard | 583 | $71,023 | 75.2 | -52.5% |