25,306 residents live across 6 ZIPs covering 2,157 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 23,212 to 25,306 from 2014 to 2024 — a +9.0% change. 3 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 83311 (Albion, $101,167 median) and poorest ZIP 83342 (Malta, $56,818) are 20.1 miles apart — a 1.8× income gap across local geography.
Median home values vary 1.9× across this county — from $224,300 in 83342 (Malta) to $435,500 in 83312 (Almo).
Density varies 59× across the county — from 1 people/sq mi in 83342 (Malta) to 73 in 83318 (Burley).
Educational attainment ranges from 16.2% bachelor's+ in 83312 (Almo) to 28.4% in 83311 (Albion) — the breadth of educational profiles across the area.
Within Idaho, this is the #44 most populous of 46 counties and ranks #45 for median household income .
Weighted by population, the typical household earns about $70,587 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.9% of adults age 25+ hold a bachelor's degree or higher (3,143 of 15,011 reporting).
5 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.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
Cassia County lost 24.6% of residents between 2014 and 2024. ZIPs that shed the largest share: