| ZIP Codes: | 9 ZIP Codes (8 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 208 / 986 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:11:58 PM |
| Population: | 93,877 [See All] |
| FIPS: | 16083 |
| CBSA: | Twin Falls, ID |
| Land Area: | 2,462 sq mi |
| Water Area: | 6 sq mi |
| Coordinates: | 42.4358, -114.5823 |
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93,877 residents live across 9 ZIPs covering 2,462 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 78,994 to 93,877 from 2014 to 2024 — a +18.8% change. 6 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 83341 (Kimberly, $99,100 median) and poorest ZIP 83321 (Castleford, $60,000) are 28.8 miles apart — a 1.7× income gap across local geography.
Median home values vary 1.6× across this county — from $272,800 in 83334 (Hansen) to $425,800 in 83344 (Murtaugh).
Density varies 67× across the county — from 3 people/sq mi in 83321 (Castleford) to 177 in 83301 (Twin Falls).
Educational attainment ranges from 14.6% bachelor's+ in 83344 (Murtaugh) to 25.0% in 83301 (Twin Falls) — the breadth of educational profiles across the area.
Within Idaho, this is the #5 most populous of 46 counties and ranks #15 for median household income with the #14 fastest decade growth .
Weighted by population, the typical household earns about $67,760 across the county — reflecting what a typical resident sees, not a simple ZIP average.
23.5% of adults age 25+ hold a bachelor's degree or higher (14,332 of 60,920 reporting).
8 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 83301 | Twin Falls | Standard | 63,592 | $62,647 | 360.1 | 18.7% |
| 83316 | Buhl | Standard | 10,456 | $69,593 | 334.7 | 9.0% |
| 83341 | Kimberly | Standard | 9,531 | $99,100 | 110.6 | 36.7% |
| 83328 | Filer | Standard | 6,320 | $70,851 | 71.1 | 23.1% |
| 83334 | Hansen | Standard | 2,227 | $64,583 | 113.0 | 9.5% |
| 83344 | Murtaugh | Standard | 1,234 | $65,417 | 169.3 | 16.4% |
| 83321 | Castleford | Standard | 482 | $60,000 | 182.0 | -2.6% |
| 83302 | Rogerson | Standard | 35 | $108,281 | 1,121.3 | -71.1% |
| 83303 | Twin Falls | PO Box | — | — | 0.0 | — |