| ZIP Codes: | 9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 785 / 913 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:12 PM |
| Population: | 18,490 [See All] |
| FIPS: | 20087 |
| CBSA: | Topeka, KS |
| Land Area: | 585 sq mi |
| Water Area: | 23 sq mi |
| Coordinates: | 39.2313, -95.3858 |
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18,490 residents live across 9 ZIPs covering 585 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 18,964 to 18,490 from 2014 to 2024 — a -2.5% change. 4 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 66054 (Mc Louth, $98,214 median) and poorest ZIP 66097 (Winchester, $66,369) are 9.1 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.6× across this county — from $155,800 in 66060 (Nortonville) to $254,300 in 66097 (Winchester).
Density varies 3× across the county — from 21 people/sq mi in 66097 (Winchester) to 62 in 66070 (Ozawkie).
Educational attainment ranges from 16.5% bachelor's+ in 66060 (Nortonville) to 29.5% in 66073 (Perry) — the breadth of educational profiles across the area.
Within Kansas, this is the #30 most populous of 106 counties and ranks #13 for median household income .
Weighted by population, the typical household earns about $82,175 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.4% of adults age 25+ hold a bachelor's degree or higher (3,093 of 13,195 reporting).
9 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 66512 | Meriden | Standard | 3,678 | $79,008 | 71.8 | 14.9% |
| 66054 | Mc Louth | Standard | 2,777 | $98,214 | 77.8 | -11.9% |
| 66088 | Valley Falls | Standard | 2,697 | $75,795 | 122.9 | 1.1% |
| 66066 | Oskaloosa | Standard | 2,432 | $79,990 | 89.0 | -5.4% |
| 66073 | Perry | Standard | 2,263 | $86,641 | 69.9 | 2.0% |
| 66070 | Ozawkie | Standard | 1,944 | $85,714 | 31.1 | -18.8% |
| 66060 | Nortonville | Standard | 1,325 | $77,222 | 61.2 | 16.5% |
| 66097 | Winchester | Standard | 995 | $66,369 | 48.2 | -16.1% |
| 66429 | Grantville | Standard | 379 | $68,780 | 13.0 | -13.1% |