Bonneville County, ID: Cities, ZIP Codes & Population
Bonneville County is a county-level area in Idaho identified by the FIPS code 16019. Our data lists 7 places in it, led by Idaho Falls, ID, with combined estimates of about 125,381 people across those places. This page shows its cities, ZIP codes, time zone and neighboring counties.
What are the key facts about Bonneville County?
| County | Bonneville County |
|---|---|
| State | Idaho |
| FIPS code | 16019 |
| Places in our data | 7 |
| Places with a city page | 2 |
| Combined place estimates | 125,381 |
| Largest place | Idaho Falls, ID (100,442) |
| Rank in state | 4th of 44 counties by combined place population |
| Weighted density | 2,537 per sq mi |
| Time zone | Mountain time |
| ZIP codes | 10 |
Which cities and towns are in Bonneville County?
Bonneville County has 2 places large enough for a full page on this site. They are ranked below by estimated population, together with whether each is incorporated, its density in people per square mile and the number of ZIP codes it uses. Idaho Falls, ID is the largest, followed by Ammon, ID.
| Place | Type | Population | Per sq mi | ZIPs |
|---|---|---|---|---|
| Idaho Falls, ID | Incorporated | 100,442 | 2,618 | 4 |
| Ammon, ID | Incorporated | 17,115 | 2,253 | 3 |
The county also contains 5 smaller communities that appear here but do not have separate pages because their populations are too small for reliable data: Lincoln, Iona, Ucon, Irwin, Swan Valley. Residents of these places often depend on the county for services such as roads, courts and public health.
How large is Bonneville County compared with other counties in Idaho?
Adding up the estimates for the places in our data gives 125,381 people, which ranks Bonneville County 4th among 44 counties in Idaho. The average listed place has about 17,912 residents. The weighted density is about 2,537 people per square mile, which is suburban by our scale. These totals add up place estimates, so they can differ from the official county population, which includes people outside any listed place. See why population figures differ.
What ZIP codes are in Bonneville County?
The places in Bonneville County use 10 ZIP codes: 83401, 83402, 83403, 83404, 83406, 83415, 83427, 83428, 83449, 83454. Every code begins with 8, which is assigned to the Mountain West (Arizona, Colorado, Idaho, Nevada, New Mexico, Utah and Wyoming). A ZIP code can cross county lines, so a code listed here may also serve addresses in a neighboring county. Use the ZIP code lookup to check a single code, or read how ZIP codes work.
Which counties are near Bonneville County?
The closest counties by distance between the average locations of their places are listed below. The distance is a rough guide to how close the areas are, because county shapes vary widely.
- Jefferson County, ID — about 23 miles northwest (center to center), 12,661 people in listed places
- Madison County, ID — about 25 miles north (center to center), 32,431 people in listed places
- Teton County, ID — about 36 miles northeast (center to center), 4,608 people in listed places
- Bingham County, ID — about 37 miles southwest (center to center), 26,432 people in listed places
- Fremont County, ID — about 41 miles north (center to center), 6,393 people in listed places
- Teton County, WY — about 48 miles east (center to center), 21,460 people in listed places
What does the FIPS code 16019 mean?
The first two digits, 16, identify Idaho, and the last three, 019, identify Bonneville County inside that state. Government datasets use this code to join records without confusing counties that share a name. Our guide to counties and FIPS codes explains the numbering, and the Idaho hub lists every county we cover in the state.
Where to go next
Combined place populations are estimates from a compiled dataset and are not official county totals.