| ZIP Codes: | 7 ZIP Codes (6 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 319 / 563 / 641 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:08 PM |
| Population: | 11,850 [See All] |
| FIPS: | 19037 |
| Land Area: | 525 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 43.0628, -92.3654 |
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11,850 residents live across 7 ZIPs covering 525 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 12,555 to 11,850 from 2014 to 2024 — a -5.6% change. 1 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 50659 (New Hampton, $78,153 median) and poorest ZIP 52154 (Lawler, $58,393) are 10.0 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.8× across this county — from $114,600 in 50645 (Ionia) to $206,900 in 50659 (New Hampton).
Density varies 5× across the county — from 8 people/sq mi in 52154 (Lawler) to 37 in 50659 (New Hampton).
Educational attainment ranges from 6.7% bachelor's+ in 50603 (Alta Vista) to 25.8% in 50659 (New Hampton) — the breadth of educational profiles across the area.
Within Iowa, this is the #63 most populous of 99 counties and ranks #70 for median household income .
Weighted by population, the typical household earns about $73,547 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.2% of adults age 25+ hold a bachelor's degree or higher (1,755 of 8,270 reporting).
6 Standard delivery, 1 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.
Chickasaw County lost 5.6% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 50659 | New Hampton | Standard | 5,688 | $78,153 | 154.9 | -0.2% |
| 50658 | Nashua | Standard | 2,450 | $71,936 | 77.2 | -0.7% |
| 50630 | Fredericksburg | Standard | 1,372 | $71,518 | 80.5 | -26.9% |
| 50645 | Ionia | Standard | 1,193 | $64,408 | 86.0 | 24.0% |
| 52154 | Lawler | Standard | 592 | $58,393 | 74.2 | -28.8% |
| 50603 | Alta Vista | Standard | 555 | $74,271 | 52.2 | -22.8% |
| 50661 | North Washington | PO Box | — | — | 0.0 | — |