  the boise cityânampa, idaho metropolitan statistical area (msa) or boise city-mountain home-ontario, id-or combined statistical area(commonly known as the boise metropolitan area or the treasure valley), as defined by the united states census bureau, is an area consisting of seven counties in southwestern idaho, and malheur county, oregon anchored by the cities of boise and nampa. it is the state's largest officially designated metropolitan area and includes idaho's three largest cities &ndash; boise, nampa, and meridian. nearly 40 percent of idaho's total population lives in the area. thumb|boise, from its foothills as of the 2010 census, the msa had a population of 616,561. the metro area is currently the third largest in the us section of the pacific northwest after seattle and portland, and is the 86th largest metropolitan area in the united states. thumb|downtown boise in 2013 ==counties== *ada *boise *canyon *elmore *gem *malheur *owyhee *payette ==demographics== as of the 2010 census, there were 616,561 people, 170,291 households, and 120,118 families residing within the msa. the racial makeup of the msa was 89.80% white, 0.52% african american, 0.80% native american, 1.38% asian, 0.14% pacific islander, 5.02% from other races, and 2.35% from two or more races. [[h
Boise_metropolitan_area Metropolitan_areas_of_Idaho Regions_of_Idaho