Founded in 1893, Fremont County is one of 44 counties in the state of Idaho. Historically, Fremont County was formed from Bingham County. The city of Saint Anthony is the county seat. With FIPS code of 43, Fremont County has a population of 13,592 and area of 1,867 square miles (4,836 km2).
List of all cities in Fremont County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Anthony, ID | 83445 | 208 |
| Ashton, ID | 83420 | 208 |
| Big Springs, ID | 83433 | 208 |
| Box Canyon, ID | 83429 | 208 |
| Canyon Creek, ID | 83436 | 208 |
| Chester, ID | 83421 | 208 |
| Clementsville, ID | 83436 | 208 |
| Drummond, ID | 83420 | 208 |
| Egin, ID | 83445 | 208 |
| Heman, ID | 83445 | 208 |
| Island Park, ID | 83429 | 208 |
| 83433 | 208 | |
| Lamont, ID | 83420 | 208 |
| Last Chance Resort, ID | 83429 | 208 |
| Macks Inn, ID | 83433 | 208 |
| Marysville, ID | 83420 | 208 |
| Newdale, ID | 83436 | 208 |
| Parker, ID | 83438 | 208 |
| Ponds Resort, ID | 83429 | 208 |
| Saint Anthony, ID | 83445 | 208 |
| Teton, ID | 83451 | 208 |
| Twin Groves, ID | 83445 | 208 |
| Warm River, ID | 83420 | 208 |
| Wilford, ID | 83445 | 208 |