| ZIP Codes: | 9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 785 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:12:14 PM |
| Population: | 16,066 [See All] |
| FIPS: | 20139 |
| CBSA: | Topeka, KS |
| Land Area: | 719 sq mi |
| Water Area: | 14 sq mi |
| Coordinates: | 38.6750, -95.6658 |
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16,066 residents live across 9 ZIPs covering 719 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 16,896 to 16,066 from 2014 to 2024 — a -4.9% change. 3 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 66524 (Overbrook, $84,375 median) and poorest ZIP 66510 (Melvern, $57,262) are 21.3 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.8× across this county — from $99,800 in 66537 (Scranton) to $178,300 in 66510 (Melvern).
Density varies 9× across the county — from 11 people/sq mi in 66510 (Melvern) to 104 in 66543 (Vassar).
Educational attainment ranges from 16.6% bachelor's+ in 66510 (Melvern) to 30.3% in 66524 (Overbrook) — the breadth of educational profiles across the area.
Within Kansas, this is the #31 most populous of 106 counties and ranks #34 for median household income .
Weighted by population, the typical household earns about $74,113 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.8% of adults age 25+ hold a bachelor's degree or higher (2,454 of 11,274 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 |
|---|---|---|---|---|---|---|
| 66523 | Osage City | Standard | 3,941 | $74,716 | 155.3 | 8.6% |
| 66524 | Overbrook | Standard | 2,473 | $84,375 | 132.9 | -14.9% |
| 66414 | Carbondale | Standard | 2,360 | $74,063 | 66.2 | -13.7% |
| 66413 | Burlingame | Standard | 1,721 | $65,179 | 99.2 | 2.5% |
| 66451 | Lyndon | Standard | 1,671 | $76,908 | 80.7 | -4.6% |
| 66537 | Scranton | Standard | 1,475 | $70,000 | 50.2 | 11.0% |
| 66543 | Vassar | Standard | 980 | $75,288 | 9.4 | -1.7% |
| 66528 | Quenemo | Standard | 761 | $73,472 | 64.7 | -29.5% |
| 66510 | Melvern | Standard | 684 | $57,262 | 60.5 | -13.3% |