Founded in 1892, Canyon County is one of 44 counties in the state of Idaho. Historically, Canyon County was formed from Ada County. The city of Caldwell is the county seat. With FIPS code of 27, Canyon County has a population of 243,115 and area of 590 square miles (1,528 km2).
List of all cities in Canyon County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Apple Valley, ID | 83660 | 208 |
| Bowmont, ID | 83686 | 208 |
| Caldwell, ID | 83605 | 208 |
| 83606 | 208 | |
| 83607 | 208 | |
| Doles, ID | 83605 | 208 |
| Enrose, ID | 83605 | 208 |
| Givens Hot Springs, ID | 83641 | 208 |
| Greenleaf, ID | 83626 | 208 |
| Guffey, ID | 83641 | 208 |
| Huston, ID | 83630 | 208 |
| Knowlton Heights, ID | 83605 | 208 |
| Melba, ID | 83641 | 208 |
| Middleton, ID | 83644 | 208 |
| Nampa, ID | 83651 | 208 |
| 83652 | 208 | |
| 83653 | 208 | |
| 83686 | 208 | |
| 83687 | 208 | |
| Notus, ID | 83656 | 208 |
| Parma, ID | 83660 | 208 |
| Roswell, ID | 83660 | 208 |
| Stoddard, ID | 83641 | 208 |
| Sunnyslope, ID | 83605 | 208 |
| Weitz, ID | 83605 | 208 |
| Wilder, ID | 83676 | 208 |
| Wilson, ID | 83641 | 208 |