| ZIP Codes: | 8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 641 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:13 PM |
| Population: | 6,462 [See All] |
| FIPS: | 19185 |
| Land Area: | 556 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 40.7330, -93.3594 |
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6,462 residents live across 8 ZIPs covering 556 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 6,475 to 6,462 from 2014 to 2024 — a -0.2% change. 5 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 50052 (Clio, $93,125 median) and poorest ZIP 50147 (Lineville, $38,281) are 5.8 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.0× across this county — from $82,500 in 52583 (Promise City) to $167,600 in 52590 (Seymour).
Educational attainment ranges from 7.5% bachelor's+ in 52583 (Promise City) to 49.3% in 50052 (Clio) — the breadth of educational profiles across the area.
Within Iowa, this is the #93 most populous of 99 counties and ranks #83 for median household income .
Weighted by population, the typical household earns about $63,475 across the county — reflecting what a typical resident sees, not a simple ZIP average.
17.8% of adults age 25+ hold a bachelor's degree or higher (791 of 4,442 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 50060 | Corydon | Standard | 2,417 | $63,438 | 166.8 | 7.5% |
| 52590 | Seymour | Standard | 1,464 | $66,833 | 81.7 | 4.3% |
| 50123 | Humeston | Standard | 883 | $62,500 | 79.3 | 0.8% |
| 50008 | Allerton | Standard | 722 | $75,417 | 91.5 | -18.0% |
| 50147 | Lineville | Standard | 463 | $38,281 | 72.4 | 3.3% |
| 52583 | Promise City | Standard | 389 | $52,083 | 48.9 | 4.9% |
| 50052 | Clio | Standard | 80 | $93,125 | 15.5 | -57.4% |
| 50165 | Millerton | Standard | 44 | $89,375 | 0.3 | -25.4% |