| ZIP Codes: | 5 ZIP Codes (5 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 712 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:11:54 PM |
| Population: | 5,917 [See All] |
| FIPS: | 19143 |
| Land Area: | 376 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 43.3638, -95.6204 |
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5,917 residents live across 5 ZIPs covering 376 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 6,279 to 5,917 from 2014 to 2024 — a -5.8% change. 1 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 51232 (Ashton, $82,917 median) and poorest ZIP 51345 (Harris, $54,301) are 20.4 miles apart — a 1.5× income gap across local geography.
Median home values vary 2.0× across this county — from $79,300 in 51350 (Melvin) to $160,700 in 51249 (Sibley).
Density varies 4× across the county — from 6 people/sq mi in 51345 (Harris) to 27 in 51249 (Sibley).
Educational attainment ranges from 5.6% bachelor's+ in 51354 (Ocheyedan) to 21.2% in 51249 (Sibley) — the breadth of educational profiles across the area.
Within Iowa, this is the #96 most populous of 99 counties and ranks #71 for median household income .
Weighted by population, the typical household earns about $66,296 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.8% of adults age 25+ hold a bachelor's degree or higher (704 of 4,192 reporting).
5 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Osceola County lost 5.8% of residents between 2014 and 2024. ZIPs that shed the largest share: