| ZIP Codes: | 12 ZIP Codes (9 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 563 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:53 PM |
| Population: | 19,123 [See All] |
| FIPS: | 19097 |
| Land Area: | 643 sq mi |
| Water Area: | 16 sq mi |
| Coordinates: | 42.1580, -90.5434 |
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19,123 residents live across 12 ZIPs covering 643 sq mi, served by 12 distinct USPS-recognized cities.
Population moved from 19,777 to 18,863 from 2014 to 2024 — a -4.6% change. 4 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 52054 (La Motte, $103,819 median) and poorest ZIP 52071 (Saint Donatus, $44,141) are 6.5 miles apart — a 2.4× income gap across local geography.
Median home values vary 3.4× across this county — from $71,700 in 52207 (Baldwin) to $244,600 in 52031 (Bellevue).
Density varies 512× across the county — from 3 people/sq mi in 52074 (Spragueville) to 1,761 in 52030 (Andrew).
Educational attainment ranges from 6.7% bachelor's+ in 52071 (Saint Donatus) to 24.9% in 52031 (Bellevue) — the breadth of educational profiles across the area.
Within Iowa, this is the #36 most populous of 99 counties and ranks #60 for median household income .
Weighted by population, the typical household earns about $75,735 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 (2,738 of 13,655 reporting).
9 Standard delivery, 3 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 |
|---|---|---|---|---|---|---|
| 52060 | Maquoketa | Standard | 8,007 | $68,143 | 162.0 | -6.2% |
| 52031 | Bellevue | Standard | 5,403 | $86,674 | 173.2 | -0.8% |
| 52069 | Preston | Standard | 1,743 | $75,313 | 48.2 | 12.1% |
| 52070 | Sabula | Standard | 990 | $79,271 | 57.2 | 6.3% |
| 52054 | La Motte | Standard | 794 | $103,819 | 55.6 | -8.3% |
| 52064 | Miles | Standard | 685 | $74,583 | 42.4 | -22.6% |
| 52309 | Monmouth | Standard | 443 | $56,250 | 41.8 | 29.9% |
| 52030 | Andrew | PO Box | 423 | $66,343 | 0.2 | 6.0% |
| 52207 | Baldwin | Standard | 256 | $59,250 | 26.4 | -38.0% |
| 52071 | Saint Donatus | PO Box | 135 | $44,141 | 0.4 | — |
| 52075 | Springbrook | PO Box | 125 | $53,750 | 0.6 | — |
| 52074 | Spragueville | Standard | 119 | $86,250 | 34.6 | -70.9% |