ZIP code · Castleford · Idaho · United States
ZIP code 83321 — Castleford
ZIP code 83321 serves Castleford, Idaho.
- Postal code
- 83321Single source Value from one source, not cross-checked.
- City
- Castleford
- County
- Twin Falls FIPS 16083
- State
- Idaho
- Country
- United States
- Coordinates
- 42.5210, -114.8734 — precision precise (locality)
View on OpenStreetMap - Population
- 424 (ZCTA, ACS 5-year)
- Population density
- 2 / sq mi
- Land area
- 181.2 sq mi (469.3 km²) (ZCTA, ACS 5-year)
- Median household income
- $54,861
- Per-capita income
- $28,885
- Median age
- 40.6
- Households
- 191
- Housing units
- 214
- Median home value
- $200,000
- Median gross rent
- $1,008 / month
- Congressional district
- ID-2 (119th Congress)
- USDA hardiness zone
- 6b (-5 to 0 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Boise (UTC−7 / UTC−6 DST)
Tools: compare 83321 with another ZIP · ZIPs within 25 miles · distance from 83321
Map of ZIP code 83321
Climate — monthly normals
Warmest month Jul (avg high 88°F), coldest Dec (avg low 19°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 36 | 42 | 53 | 60 | 70 | 78 | 88 | 86 | 76 | 62 | 47 | 35 |
| Avg low °F | 20 | 23 | 28 | 33 | 41 | 47 | 54 | 52 | 44 | 35 | 26 | 19 |
| Precip in | 1.2 | 1.1 | 1.0 | 1.2 | 1.4 | 0.8 | 0.2 | 0.3 | 0.5 | 0.8 | 0.9 | 1.3 |
NOAA 1991–2020 climate normals from the nearest station: CASTLEFORD 2 N (2.1 mi) · NOAA NCEI
Places in ZIP 83321
- 2 schools
- 1 restaurants & cafés
- 1 bars & pubs
- 1 post offices
- 1 places of worship
- 1 gas stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page