Founded in 1913, Madison County is one of 44 counties in the state of Idaho. Historically, Madison County was formed from Fremont County. The city of Rexburg is the county seat. With FIPS code of 65, Madison County has a population of 53,881 and area of 472 square miles (1,222 km2).
List of all cities in Madison County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Archer, ID | 83440 | 208 |
| Burton, ID | 83440 | 208 |
| BYU-IDAHO, ID | 83460 | 208 |
| Edmonds, ID | 83440 | 208 |
| Lyman, ID | 83440 | 208 |
| Plano, ID | 83440 | 208 |
| Rexburg, ID | 83440 | 208 |
| 83441 | 208 | |
| 83460 | 208 | |
| Rexcraft, ID | 83441 | 208 |
| Sugar City, ID | 83448 | 208 |
| Sunnydell, ID | 83440 | 208 |
| Thornton, ID | 83440 | 208 |