| ZIP Codes: | 9 ZIP Codes (8 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 319 / 641 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:53:10 PM |
| Population: | 11,663 [See All] |
| FIPS: | 19075 |
| CBSA: | Waterloo-Cedar Falls, IA |
| Land Area: | 429 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 42.3772, -92.7706 |
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11,663 residents live across 9 ZIPs covering 429 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 11,634 to 11,567 from 2014 to 2024 — a -0.6% change. 5 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 50642 (Holland, $108,750 median) and poorest ZIP 50657 (Morrison, $66,250) are 10.7 miles apart — a 1.6× income gap across local geography.
Median home values vary 2.7× across this county — from $95,000 in 50657 (Morrison) to $260,100 in 50624 (Dike).
Density varies 131× across the county — from 11 people/sq mi in 50609 (Beaman) to 1,484 in 50673 (Stout).
Educational attainment ranges from 15.5% bachelor's+ in 50680 (Wellsburg) to 42.4% in 50624 (Dike) — the breadth of educational profiles across the area.
Within Iowa, this is the #65 most populous of 99 counties and ranks #16 for median household income .
Weighted by population, the typical household earns about $86,656 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.4% of adults age 25+ hold a bachelor's degree or higher (2,254 of 8,230 reporting).
8 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 50638 | Grundy Center | Standard | 3,441 | $85,223 | 95.4 | 4.8% |
| 50669 | Reinbeck | Standard | 2,439 | $81,650 | 94.2 | 1.7% |
| 50624 | Dike | Standard | 1,855 | $96,713 | 50.1 | -5.0% |
| 50621 | Conrad | Standard | 1,601 | $88,077 | 65.3 | 6.2% |
| 50680 | Wellsburg | Standard | 1,027 | $75,956 | 56.6 | -21.7% |
| 50642 | Holland | Standard | 577 | $108,750 | 34.1 | -2.7% |
| 50609 | Beaman | Standard | 377 | $90,250 | 33.4 | 7.4% |
| 50673 | Stout | PO Box | 250 | $66,875 | 0.2 | 5.5% |
| 50657 | Morrison | Standard | 96 | $66,250 | 0.2 | — |