Founded in 1911, Bonneville County is one of 44 counties in the state of Idaho. Historically, Bonneville County was formed from Bingham County. The city of Idaho Falls is the county seat. With FIPS code of 19, Bonneville County has a population of 127,930 and area of 1,869 square miles (4,841 km2).
List of all cities in Bonneville County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Ammon, ID | 83401 | 208 |
| 83406 | 208 | |
| Beachs Corner, ID | 83401 | 208 |
| Bone, ID | 83401 | 208 |
| Coltman, ID | 83401 | 208 |
| Eagle Rock, ID | 83402 | 208 |
| Grant, ID | 83401 | 208 |
| Hillview, ID | 83401 | 208 |
| Idaho Falls, ID | 83401 | 208 |
| 83402 | 208 | |
| 83403 | 208 | |
| 83404 | 208 | |
| 83405 | 208 | |
| 83406 | 208 | |
| 83415 | 208 | |
| Idaho National Lab, ID | 83415 | 208 |
| Iona, ID | 83427 | 208 |
| Irwin, ID | 83428 | 208 |
| Lincoln, ID | 83401 | 208 |
| New Sweden, ID | 83401 | 208 |
| Osgood, ID | 83401 | 208 |
| Palisades, ID | 83428 | 208 |
| Saint Leon, ID | 83401 | 208 |
| Scoville, ID | 83415 | 208 |
| Shelton, ID | 83401 | 208 |
| Swan Valley, ID | 83449 | 208 |
| Taylor, ID | 83401 | 208 |
| Ucon, ID | 83454 | 208 |