Boise County, Idaho
Boise County, Idaho, has 8,545 residents (July 2025 estimate). Its county seat is Idaho City. It uses Mountain Time and covers 1,899 sq mi (4,919 km²) of land.
- Resident population, July 2025
- 8,545
- Land area
- 1,899 sq mi (4,919 km²)
- County seat or government
- Idaho City
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $78,774 ± $3,983
- Median home value
- $476,100 ± $37,536
- Median rent, with utilities
- $850 ± $222
- Homes lived in by their owners
- 90.3% ± 8.6 points
- County type
- County
- Metro or micro area
- Boise City, ID metro areaOutlying county
- Water area
- 7.38 sq mi (19.1 km²)
- State
- Idaho
- County code (FIPS)
- 16015
- Coordinates (central point)
- 43.987275, -115.715110
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Boise County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Mountain TimeAmerica/Boise | UTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 8370224,163 people
- 8371621,402 people
- 836222,132 people
- 836311,916 people
- 836291,749 people
- 83670752 people
- 83637226 people
- 8366630 people
- 836020 people
9 ZIP Code areas overlap Boise County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Boise County, largest first
- Boise City Independent School District 1212,323 people
- Emmett Independent School District 22120,614 people
- Basin School District 724,161 people
- Garden Valley School District 712,358 people
- Horseshoe Bend School District 731,754 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Robie Creek, Idaho (CDP)1,213 people
- Horseshoe Bend, Idaho (city)758 people
- Idaho City, Idaho (city)581 people
- Garden Valley, Idaho (CDP)438 people
- Crouch, Idaho (city)214 people
- Lowman, Idaho (CDP)46 people
- Placerville, Idaho (city)30 people
- Banks, Idaho (CDP)0 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Gem County, Idaho34 mi west
- Elmore County, Idaho43 mi south
- Ada County, Idaho45 mi southwest
- Valley County, Idaho60 mi north
- Custer County, Idaho75 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.