Southwestern Idaho | |
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Region | |
![]() A historic building in Silver City, a ghost town located in Southwestern Idaho. | |
![]() Map of counties included in Southwestern Idaho (highlighted in red). | |
Country | ![]() |
State | ![]() |
Largest city | Boise (pop.: 235,684) |
Area | |
• Total | 21,728.5 sq mi (56,277 km2) |
Population (2020) | |
• Total | 845,395 |
• Density | 38.9/sq mi (15.0/km2) |
Time zone | UTC−7 (Mountain) |
• Summer (DST) | UTC−6 (MDT) |
Area code(s) | 208, 986 |
Southwestern Idaho is a geographical term for the area along the U.S. state of Idaho's borders with Oregon and Nevada. It includes the populous areas of the Boise metropolitan area and the Treasure Valley.[1][2]
The counties of Ada, Adams, Boise, Canyon, Elmore, Gem, Owyhee, Payette, Valley, and Washington are included in the region.