| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 712 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:53 PM |
| Population: | 12,262 [See All] |
| FIPS: | 19119 |
| Land Area: | 576 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 43.3779, -96.2283 |
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12,262 residents live across 8 ZIPs covering 576 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 11,494 to 12,262 from 2014 to 2024 — a +6.7% change. 4 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 51242 (Lester, $95,625 median) and poorest ZIP 51237 (George, $61,667) are 17.9 miles apart — a 1.6× income gap across local geography.
Median home values vary 3.0× across this county — from $92,200 in 51243 (Little Rock) to $280,600 in 51241 (Larchwood).
Density varies 8× across the county — from 13 people/sq mi in 51243 (Little Rock) to 104 in 51242 (Lester).
Educational attainment ranges from 7.6% bachelor's+ in 51235 (Doon) to 25.1% in 51241 (Larchwood) — the breadth of educational profiles across the area.
Within Iowa, this is the #62 most populous of 99 counties and ranks #30 for median household income with the #6 fastest decade growth .
Weighted by population, the typical household earns about $76,785 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.1% of adults age 25+ hold a bachelor's degree or higher (1,572 of 7,838 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 |
|---|---|---|---|---|---|---|
| 51246 | Rock Rapids | Standard | 4,041 | $72,400 | 150.2 | 7.7% |
| 51241 | Larchwood | Standard | 2,103 | $87,446 | 90.6 | 18.7% |
| 51240 | Inwood | Standard | 1,914 | $83,929 | 104.5 | 9.1% |
| 51237 | George | Standard | 1,605 | $61,667 | 93.0 | -1.8% |
| 51235 | Doon | Standard | 1,007 | $71,016 | 45.3 | -3.0% |
| 51243 | Little Rock | Standard | 735 | $83,750 | 55.7 | -10.9% |
| 51230 | Alvord | Standard | 478 | $75,625 | 32.9 | -6.6% |
| 51242 | Lester | PO Box | 379 | $95,625 | 3.6 | 84.0% |