The Boise City-Nampa, ID Metropolitan Statistical Area (MSA) (commonly known as the Boise Metropolitan Area or the Treasure Valley) is a region in southwestern Idaho which officially includes Ada, Boise, Canyon, Gem and Owyhee Counties. It includes three of Idaho's five largest cities, Boise, Nampa and Meridian. It is the state's largest officially designated metropolitan area.

In 2004 the metropolitan area had a total estimated population of 526,656.

Cities in the Boise Metro Area

Reference

• Demographic and Income Profile

Boise, Idaho | Regions in Idaho