| ZIP Codes: | 11 ZIP Codes (11 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 319 / 563 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:50 PM |
| Population: | 21,968 [See All] |
| FIPS: | 19019 |
| Land Area: | 639 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 42.5060, -91.8670 |
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21,968 residents live across 11 ZIPs covering 639 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 22,405 to 21,968 from 2014 to 2024 — a -2.0% change. 4 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 50629 (Fairbank, $103,106 median) and poorest ZIP 50607 (Aurora, $54,583) are 17.2 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.1× across this county — from $107,800 in 50671 (Stanley) to $226,400 in 50648 (Jesup).
Density varies 107× across the county — from 7 people/sq mi in 50671 (Stanley) to 698 in 52326 (Quasqueton).
Educational attainment ranges from 15.0% bachelor's+ in 50641 (Hazleton) to 33.3% in 50671 (Stanley) — the breadth of educational profiles across the area.
Within Iowa, this is the #28 most populous of 99 counties and ranks #51 for median household income .
Weighted by population, the typical household earns about $82,232 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.8% of adults age 25+ hold a bachelor's degree or higher (3,399 of 14,909 reporting).
11 Standard delivery, 0 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 |
|---|---|---|---|---|---|---|
| 50644 | Independence | Standard | 8,419 | $80,026 | 146.0 | -1.6% |
| 50648 | Jesup | Standard | 4,269 | $95,353 | 86.7 | -7.7% |
| 50629 | Fairbank | Standard | 2,082 | $103,106 | 81.8 | -3.4% |
| 50641 | Hazleton | Standard | 1,950 | $67,115 | 41.4 | -1.3% |
| 50682 | Winthrop | Standard | 1,692 | $89,375 | 81.1 | 3.4% |
| 52210 | Brandon | Standard | 958 | $70,714 | 37.1 | 16.1% |
| 52326 | Quasqueton | Standard | 694 | $76,250 | 1.0 | 55.3% |
| 52329 | Rowley | Standard | 671 | $57,500 | 50.0 | -10.7% |
| 50650 | Lamont | Standard | 648 | $57,500 | 37.0 | 22.7% |
| 50607 | Aurora | Standard | 403 | $54,583 | 48.7 | -36.0% |
| 50671 | Stanley | Standard | 182 | $57,212 | 27.9 | -32.8% |