| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 712 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:54 PM |
| Population: | 14,685 [See All] |
| FIPS: | 19141 |
| Land Area: | 627 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 43.0823, -95.6282 |
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14,685 residents live across 8 ZIPs covering 627 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 14,670 to 14,685 from 2014 to 2024 — a +0.1% change. 4 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 51231 (Archer, $108,058 median) and poorest ZIP 51009 (Calumet, $58,750) are 14.9 miles apart — a 1.8× income gap across local geography.
Median home values vary 2.4× across this county — from $83,300 in 51009 (Calumet) to $197,800 in 51201 (Sheldon).
Density varies 31× across the county — from 13 people/sq mi in 51058 (Sutherland) to 405 in 51009 (Calumet).
Educational attainment ranges from 19.7% bachelor's+ in 51046 (Paullina) to 33.5% in 51231 (Archer) — the breadth of educational profiles across the area.
Within Iowa, this is the #52 most populous of 99 counties and ranks #50 for median household income .
Weighted by population, the typical household earns about $71,339 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 (2,182 of 9,983 reporting).
7 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 |
|---|---|---|---|---|---|---|
| 51201 | Sheldon | Standard | 6,430 | $68,799 | 112.5 | 4.5% |
| 51346 | Hartley | Standard | 2,247 | $72,426 | 150.6 | 4.6% |
| 51248 | Sanborn | Standard | 1,534 | $64,375 | 80.2 | -2.7% |
| 51245 | Primghar | Standard | 1,377 | $69,531 | 78.0 | -0.9% |
| 51046 | Paullina | Standard | 1,326 | $84,125 | 93.8 | -19.3% |
| 51058 | Sutherland | Standard | 1,096 | $63,036 | 83.3 | 0.5% |
| 51231 | Archer | Standard | 562 | $108,058 | 27.7 | 55.2% |
| 51009 | Calumet | PO Box | 113 | $58,750 | 0.3 | -62.8% |