| ZIP Codes: | 8 ZIP Codes (8 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 515 / 641 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:53 PM |
| Population: | 16,016 [See All] |
| FIPS: | 19121 |
| CBSA: | Des Moines-West Des Moines, IA |
| Land Area: | 476 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 41.3074, -93.9490 |
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16,016 residents live across 8 ZIPs covering 476 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 15,991 to 16,016 from 2014 to 2024 — a +0.2% change. 3 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 50072 (Earlham, $111,250 median) and poorest ZIP 50155 (Macksburg, $33,125) are 18.0 miles apart — a 3.4× income gap across local geography.
Median home values vary 3.2× across this county — from $95,000 in 50155 (Macksburg) to $305,800 in 50240 (Saint Charles).
Density varies 159× across the county — from 3 people/sq mi in 50155 (Macksburg) to 450 in 50218 (Patterson).
Educational attainment ranges from 6.9% bachelor's+ in 50218 (Patterson) to 39.3% in 50072 (Earlham) — the breadth of educational profiles across the area.
Within Iowa, this is the #45 most populous of 99 counties and ranks #20 for median household income .
Weighted by population, the typical household earns about $92,415 across the county — reflecting what a typical resident sees, not a simple ZIP average.
28.5% of adults age 25+ hold a bachelor's degree or higher (3,106 of 10,881 reporting).
8 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 50273 | Winterset | Standard | 8,950 | $82,633 | 196.7 | 7.9% |
| 50072 | Earlham | Standard | 2,979 | $111,250 | 88.2 | 4.5% |
| 50240 | Saint Charles | Standard | 2,393 | $107,563 | 74.2 | -16.6% |
| 50257 | Truro | Standard | 914 | $94,375 | 43.8 | -10.7% |
| 50218 | Patterson | Standard | 346 | $82,969 | 0.8 | 206.2% |
| 50222 | Peru | Standard | 328 | $100,568 | 38.7 | -42.2% |
| 50155 | Macksburg | Standard | 94 | $33,125 | 33.2 | -61.8% |
| 50033 | Bevington | Standard | 12 | $56,250 | 0.4 | -47.8% |