| | | Ada County | ID | 16001 | | Boise City, ID 14260 | Boise City-Mountain
Home-Ontario, ID-OR 147 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=AdaCounty+ID |
| | | Bannock County | ID | 16005 | | Pocatello, ID 38540 | | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BannockCounty+ID |
| | | Boise County | ID | 16015 | | Boise City, ID 14260 | Boise City-Mountain
Home-Ontario, ID-OR 147 | Outlying | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=BoiseCounty+ID |
| | | Bonneville County | ID | 16019 | | Idaho Falls, ID 26820 | Idaho
Falls-Rexburg-Blackfoot,
ID 292 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=BonnevilleCounty+ID |
| | | Butte County | ID | 16023 | | Idaho Falls, ID 26820 | Idaho
Falls-Rexburg-Blackfoot,
ID 292 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ButteCounty+ID |
| | | Canyon County | ID | 16027 | | Boise City, ID 14260 | Boise City-Mountain
Home-Ontario, ID-OR 147 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=CanyonCounty+ID |
| | | Franklin County | ID | 16041 | | Logan, UT-ID 30860 | | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=FranklinCounty+ID |
| | | Gem County | ID | 16045 | | Boise City, ID 14260 | Boise City-Mountain
Home-Ontario, ID-OR 147 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=GemCounty+ID |
| | | Jefferson County | ID | 16051 | | Idaho Falls, ID 26820 | Idaho
Falls-Rexburg-Blackfoot,
ID 292 | Outlying | metro county (urban) | farm-dependent | https://maps.google.com/?q=JeffersonCounty+ID |
| | | Kootenai County | ID | 16055 | | Coeur d'Alene, ID 17660 | Spokane-Spokane
Valley-Coeur
d'Alene, WA-ID 518 | Central | metro county (urban) | recreation | https://maps.google.com/?q=KootenaiCounty+ID |
