| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 563 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:08 PM |
| Population: | 14,303 [See All] |
| FIPS: | 19005 |
| Land Area: | 655 sq mi |
| Water Area: | 13 sq mi |
| Coordinates: | 43.2837, -91.3856 |
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14,303 residents live across 7 ZIPs covering 655 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 14,326 to 14,303 from 2014 to 2024 — a -0.2% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 52160 (New Albin, $85,204 median) and poorest ZIP 52146 (Harpers Ferry, $61,750) are 19.5 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.8× across this county — from $133,100 in 52162 (Postville) to $234,700 in 52146 (Harpers Ferry).
Density varies 5× across the county — from 9 people/sq mi in 52146 (Harpers Ferry) to 39 in 52162 (Postville).
Educational attainment ranges from 15.4% bachelor's+ in 52162 (Postville) to 36.2% in 52140 (Dorchester) — the breadth of educational profiles across the area.
Within Iowa, this is the #56 most populous of 99 counties and ranks #65 for median household income .
Weighted by population, the typical household earns about $68,638 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.0% of adults age 25+ hold a bachelor's degree or higher (2,168 of 9,862 reporting).
7 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 |
|---|---|---|---|---|---|---|
| 52172 | Waukon | Standard | 5,877 | $68,875 | 161.0 | 0.1% |
| 52162 | Postville | Standard | 3,744 | $64,125 | 96.4 | 11.6% |
| 52151 | Lansing | Standard | 1,886 | $69,938 | 124.8 | -1.7% |
| 52160 | New Albin | Standard | 818 | $85,204 | 57.5 | -27.2% |
| 52146 | Harpers Ferry | Standard | 752 | $61,750 | 88.2 | -25.3% |
| 52140 | Dorchester | Standard | 671 | $72,188 | 73.4 | 27.6% |
| 52170 | Waterville | Standard | 555 | $72,788 | 53.7 | 6.1% |