| ZIP Codes: | 10 ZIP Codes (9 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 515 / 712 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:51 PM |
| Population: | 10,375 [See All] |
| FIPS: | 19025 |
| Land Area: | 614 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 42.4068, -94.6027 |
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10,375 residents live across 10 ZIPs covering 614 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 10,798 to 10,299 from 2014 to 2024 — a -4.6% change. 3 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 50552 (Knierim, $89,000 median) and poorest ZIP 50575 (Pomeroy, $52,717) are 14.2 miles apart — a 1.7× income gap across local geography.
Median home values vary 3.2× across this county — from $51,100 in 50551 (Jolley) to $161,100 in 50563 (Manson).
Density varies 44× across the county — from 3 people/sq mi in 50551 (Jolley) to 152 in 50552 (Knierim).
Educational attainment ranges from 10.0% bachelor's+ in 50586 (Somers) to 32.8% in 50563 (Manson) — the breadth of educational profiles across the area.
Within Iowa, this is the #71 most populous of 99 counties and ranks #73 for median household income .
Weighted by population, the typical household earns about $67,404 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.9% of adults age 25+ hold a bachelor's degree or higher (1,615 of 7,391 reporting).
9 Standard delivery, 1 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 |
|---|---|---|---|---|---|---|
| 50579 | Rockwell City | Standard | 3,034 | $61,108 | 142.3 | 10.9% |
| 50563 | Manson | Standard | 2,505 | $71,094 | 101.5 | -0.7% |
| 51449 | Lake City | Standard | 1,950 | $75,329 | 89.9 | -6.7% |
| 50575 | Pomeroy | Standard | 696 | $52,717 | 57.7 | -48.4% |
| 50538 | Farnhamville | Standard | 661 | $62,344 | 32.6 | 34.9% |
| 50561 | Lytton | Standard | 585 | $67,446 | 48.4 | 18.7% |
| 51453 | Lohrville | Standard | 500 | $86,563 | 79.6 | -27.8% |
| 50586 | Somers | Standard | 272 | $55,375 | 33.2 | -14.7% |
| 50551 | Jolley | Standard | 96 | — | 27.9 | -11.1% |
| 50552 | Knierim | PO Box | 76 | $89,000 | 0.5 | — |