| ZIP Codes: | 8 ZIP Codes (5 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 208 / 986 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:11:57 PM |
| Population: | 13,537 [See All] |
| FIPS: | 16043 |
| CBSA: | Rexburg, ID |
| Land Area: | 1,925 sq mi |
| Water Area: | 31 sq mi |
| Coordinates: | 44.0990, -111.5211 |
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13,537 residents live across 8 ZIPs covering 1,925 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 11,718 to 13,210 from 2014 to 2024 — a +12.7% change. 5 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 83438 (Parker, $145,714 median) and poorest ZIP 83451 (Teton, $67,946) are 11.1 miles apart — a 2.1× income gap across local geography.
Median home values vary 2.2× across this county — from $232,800 in 83438 (Parker) to $502,200 in 83429 (Island Park).
Density varies 5260× across the county — from 1 people/sq mi in 83429 (Island Park) to 4,225 in 83438 (Parker).
Educational attainment ranges from 4.4% bachelor's+ in 83438 (Parker) to 31.1% in 83436 (Newdale) — the breadth of educational profiles across the area.
Within Idaho, this is the #24 most populous of 46 counties and ranks #4 for median household income with the #18 fastest decade growth .
Weighted by population, the typical household earns about $71,431 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.2% of adults age 25+ hold a bachelor's degree or higher (2,124 of 9,173 reporting).
5 Standard delivery, 3 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 83445 | Saint Anthony | Standard | 7,975 | $68,012 | 404.5 | 19.6% |
| 83420 | Ashton | Standard | 2,580 | $69,286 | 509.1 | 5.7% |
| 83451 | Teton | Standard | 993 | $67,946 | 32.2 | 4.1% |
| 83436 | Newdale | Standard | 778 | $80,000 | 180.5 | 83.1% |
| 83429 | Island Park | Standard | 628 | $78,565 | 781.9 | -30.5% |
| 83438 | Parker | PO Box | 327 | $145,714 | 0.1 | — |
| 83421 | Chester | PO Box | 220 | — | 16.3 | -30.8% |
| 83433 | Macks Inn | PO Box | 36 | $94,250 | 0.8 | 414.3% |