Castleford is a city in Twin Falls County, Idaho, home to about 183 people across 0.1 square miles. Its ZIP code is 83321.
Mostly Castleford
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| Nearest major airport | Boise Air Terminal/Gowen Field (BOI)99 miles away |
|---|---|
| Closer regional airport | Joslin Field Magic Valley Regional Airport (TWF)20 miles away |
| Nearest city of 250,000+ | Reno, NV331 miles away |
| Nearest city of 1 million+ | Los Angeles, CA618 miles away |
Straight-line distances from the center of Castleford; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Castleford had 215 residents in the 2020 census, down 22% since 2000.
It’s the 196th largest of 232 towns in Idaho by population.
Twin Falls County grew from 13,543 residents in 1910 to 90,046 in 2020.
Twin Falls County, 1910–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 88°F in summer, and winter lows average 19°F. About 10.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Castleford 2 N, ID weather station (2 miles away).
34,299 jobs at 3,026 businesses in Twin Falls County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Castleford.
Nearest hospitals
Providers with an office here
| Mental health providers | 1 |
|---|
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Public schools here are run by Castleford District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Castleford SchoolCastleford | Pre-K–12 | 274 | Public | 0.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.