Bonneville County, Idaho
Bonneville County, Idaho, has 135,771 residents (July 2025 estimate). Its county seat is Idaho Falls. It uses Mountain Time and covers 1,866 sq mi (4,833 km²) of land.
- Resident population, July 2025
- 135,771
- Land area
- 1,866 sq mi (4,833 km²)
- County seat or government
- Idaho Falls
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $79,068 ± $2,671
- Median home value
- $368,800 ± $7,397
- Median rent, with utilities
- $1,133 ± $38
- Homes lived in by their owners
- 71.7% ± 1.7 points
- County type
- County
- Metro or micro area
- Idaho Falls, ID metro areaCentral county
- Water area
- 34.3 sq mi (88.9 km²)
- State
- Idaho
- County code (FIPS)
- 16019
- Coordinates (central point)
- 43.395171, -111.621878
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 Bonneville 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
- 8340147,972 people
- 8340229,994 people
- 8340427,500 people
- 8344225,609 people
- 8340619,696 people
- 8327411,699 people
- 834272,931 people
- 834431,364 people
- 834441,261 people
- 83428576 people
- 83454409 people
- 83449273 people
14 ZIP Code areas overlap Bonneville 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 Bonneville County, largest first
- Idaho Falls School District 9163,688 people
- Bonneville Joint School District 9363,294 people
- Shelley Joint School District 6011,201 people
- Soda Springs Joint School District 1504,235 people
- Ririe Joint School District 2523,230 people
- Swan Valley Elementary School District 92933 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.
- Idaho Falls, Idaho (city)67,725 people
- Ammon, Idaho (city)19,064 people
- Lincoln, Idaho (CDP)4,002 people
- Iona, Idaho (city)2,984 people
- Ucon, Idaho (city)1,606 people
- Ririe, Idaho (city)1,079 people
- Swan Valley, Idaho (city)281 people
- Irwin, Idaho (city)236 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Madison County, Idaho27 mi north
- Teton County, Idaho33 mi northeast
- Bingham County, Idaho41 mi west
- Caribou County, Idaho42 mi south
- Jefferson County, Idaho45 mi northwest
- Teton County, Wyoming75 mi northeast
- Lincoln County, Wyoming94 mi southeast
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.
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