| ZIP Codes: | 4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 402 / 531 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:08 PM |
| Population: | 4,535 [See All] |
| FIPS: | 31143 |
| Land Area: | 353 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 41.1453, -97.6030 |
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4,535 residents live across 4 ZIPs covering 353 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 4,784 to 4,535 from 2014 to 2024 — a -5.2% change. 1 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 68662 (Shelby, $89,706 median) and poorest ZIP 68666 (Stromsburg, $63,529) are 12.8 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.7× across this county — from $115,700 in 68654 (Polk) to $191,300 in 68651 (Osceola).
Density varies 2× across the county — from 11 people/sq mi in 68654 (Polk) to 17 in 68666 (Stromsburg).
Educational attainment ranges from 13.4% bachelor's+ in 68654 (Polk) to 23.9% in 68651 (Osceola) — the breadth of educational profiles across the area.
Within Nebraska, this is the #56 most populous of 107 counties and ranks #40 for median household income .
Weighted by population, the typical household earns about $74,448 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.6% of adults age 25+ hold a bachelor's degree or higher (650 of 3,149 reporting).
4 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
Polk County lost 5.2% of residents between 2014 and 2024. ZIPs that shed the largest share: