Ketchum is a city in Blaine County, Idaho, home to about 3,594 people across 3.2 square miles. Its ZIP code is 83340.
Homes sold for a median of $1,047 per square foot in the three months ending August 2026, a balanced market.
Mostly Ketchum; also Sun Valley
Each card is that ZIP code’s whole market, including any part outside Ketchum. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Boise Air Terminal/Gowen Field (BOI)87 miles away |
|---|---|
| Closer regional airport | Friedman Memorial Airport (SUN)15 miles away |
| Nearest city of 250,000+ | Reno, NV397 miles away |
| Nearest city of 1 million+ | Los Angeles, CA699 miles away |
Straight-line distances from the center of Ketchum; 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.
Ketchum had 3,555 residents in the 2020 census, up 18% since 2000.
It’s the 44th largest of 232 towns in Idaho by population.
Blaine County grew from 4,900 residents in 1900 to 24,272 in 2020.
Blaine County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 8°F. About 17.6 inches of rain and melted snow fall in a typical year, with about 102 inches of snow.
Source: NOAA 1991–2020 climate normals, Ketchum Rs, ID weather station (6 miles away).
13,208 jobs at 1,688 businesses in Blaine County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
125 doctors and other health care providers list an office in Ketchum.
Nearest hospitals
Providers with an office here
| Primary care doctors | 11 |
|---|---|
| Specialist doctors | 33 |
| Dentists | 12 |
| Nurse practitioners and physician assistants | 12 |
| Mental health providers | 31 |
| Physical and occupational therapists | 18 |
| Optometrists | 1 |
| Chiropractors | 7 |
| Pharmacies | 2 |
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.
Established in 1880.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Blaine County District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Ernest Hemingway Steam SchoolKetchum | Pre-K–8 | 431 | Public | 5.8 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Pioneer Montessori SchoolKetchum | Pre-K–6 | 104 | Nonsectarian | 6.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Sun Valley.
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.