Idaho City is a city in Boise County, Idaho, home to about 581 people across 0.7 square miles. Its ZIP code is 83631.
Homes sold for a median of $264 per square foot in the three months ending August 2026, a seller’s market.
Each card is that ZIP code’s whole market, including any part outside Idaho City. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Idaho City’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Boise Air Terminal/Gowen Field (BOI)34 miles away |
|---|---|
| Nearest city of 250,000+ | Portland, OR359 miles away |
| Nearest city of 1 million+ | Los Angeles, CA696 miles away |
Straight-line distances from the center of Idaho City; 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.
Idaho City had 466 residents in the 2020 census, up 2% since 2000.
It’s the 136th largest of 232 towns in Idaho by population.
Boise County grew from 4,174 residents in 1900 to 7,610 in 2020.
Boise County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 14°F. About 21.1 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Idaho City, ID weather station (7 miles away).
753 jobs at 200 businesses in Boise County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
3 doctors and other health care providers list an office in Idaho City.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|---|
| Mental health providers | 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.
Public schools here are run by Basin School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Basin Elementary SchoolIdaho City | Pre-K–6 | 173 | Public | 7.2 mi |
| Idaho City High SchoolIdaho City | 7–12 | 126 | Public | 7.2 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.