| ZIP Codes: | 5 ZIP Codes (4 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 641 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:11 PM |
| Population: | 8,741 [See All] |
| FIPS: | 19117 |
| Land Area: | 434 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 41.0225, -93.3476 |
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8,741 residents live across 5 ZIPs covering 434 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 8,758 to 8,741 from 2014 to 2024 — a -0.2% change. 3 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 50151 (Lucas, $91,061 median) and poorest ZIP 50068 (Derby, $36,500) are 9.9 miles apart — a 2.5× income gap across local geography.
Median home values vary 1.8× across this county — from $83,300 in 50238 (Russell) to $149,400 in 50151 (Lucas).
Density varies 104× across the county — from 5 people/sq mi in 50068 (Derby) to 524 in 50272 (Williamson).
Educational attainment ranges from 9.0% bachelor's+ in 50068 (Derby) to 18.8% in 50151 (Lucas) — the breadth of educational profiles across the area.
Within Iowa, this is the #83 most populous of 99 counties and ranks #97 for median household income .
Weighted by population, the typical household earns about $62,501 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.2% of adults age 25+ hold a bachelor's degree or higher (977 of 6,013 reporting).
4 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.