| ZIP Codes: | 5 ZIP Codes (5 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 208 / 986 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:11:57 PM |
| Population: | 28,769 [See All] |
| FIPS: | 16039 |
| CBSA: | Mountain Home, ID |
| Land Area: | 3,283 sq mi |
| Water Area: | 22 sq mi |
| Coordinates: | 43.1308, -115.4803 |
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28,769 residents live across 5 ZIPs covering 3,283 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 26,085 to 28,769 from 2014 to 2024 — a +10.3% change. 4 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 83633 (King Hill, $84,394 median) and poorest ZIP 83623 (Glenns Ferry, $58,145) are 14.2 miles apart — a 1.5× income gap across local geography.
Median home values vary 2.7× across this county — from $163,300 in 83627 (Hammett) to $434,500 in 83633 (King Hill).
Density varies 164× across the county — from 1 people/sq mi in 83633 (King Hill) to 162 in 83648 (Mountain Home Afb).
Educational attainment ranges from 4.2% bachelor's+ in 83627 (Hammett) to 35.3% in 83648 (Mountain Home Afb) — the breadth of educational profiles across the area.
Within Idaho, this is the #13 most populous of 46 counties and ranks #26 for median household income with the #24 fastest decade growth .
Weighted by population, the typical household earns about $64,941 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.9% of adults age 25+ hold a bachelor's degree or higher (4,025 of 18,340 reporting).
5 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.