| ZIP Codes: | 4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 208 / 986 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:13:10 PM |
| Population: | 20,075 [See All] |
| FIPS: | 16045 |
| CBSA: | Boise City, ID |
| Land Area: | 541 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 44.0435, -116.4575 |
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20,075 residents live across 4 ZIPs covering 541 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 16,156 to 20,075 from 2014 to 2024 — a +24.3% change. 3 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 83670 (Sweet, $91,685 median) and poorest ZIP 83657 (Ola, $51,183) are 16.9 miles apart — a 1.8× income gap across local geography.
Median home values vary 1.4× across this county — from $429,100 in 83617 (Emmett) to $606,000 in 83657 (Ola).
Educational attainment ranges from 20.1% bachelor's+ in 83670 (Sweet) to 44.4% in 83657 (Ola) — the breadth of educational profiles across the area.
Within Idaho, this is the #19 most populous of 45 counties and ranks #17 for median household income with the #7 fastest decade growth .
Weighted by population, the typical household earns about $66,281 across the county — reflecting what a typical resident sees, not a simple ZIP average.
20.2% of adults age 25+ hold a bachelor's degree or higher (2,885 of 14,257 reporting).
4 Standard delivery, 0 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.