The U.S. currently has 22 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated five combined statistical areas, seven metropolitan statistical areas, and 10 micropolitan statistical areas in Idaho. As of 2025, the largest of these is the Boise City–Mountain Home–Ontario, ID-OR CSA, anchored by Idaho's capital and largest city, Boise.
+The 22 United States statistical areas and 44 counties of the State of IdahoCombined statistical area2025 population (est.)Core-based statistical area2025 population (est.)County2025 population (est.)Boise City–Mountain Home–Ontario, ID-OR CSA953,793921,532 ()Boise City, ID MSA864,243Ada County, Idaho546,141Canyon County, Idaho275,123Gem County, Idaho21,773Owyhee County, Idaho12,661Boise County, Idaho8,545Ontario, OR-ID μSA60,08527,824 (ID)Malheur County, Oregon32,261Payette County, Idaho27,824Mountain Home, ID μSA29,465Elmore County, Idaho29,465Idaho Falls–Rexburg–Blackfoot, ID CSA294,384Idaho Falls, ID MSA173,851Bonneville County, Idaho135,771Jefferson County, Idaho35,297Butte County, Idaho2,783Rexburg, ID μSA69,380Madison County, Idaho55,172Fremont County, Idaho14,208Blackfoot, ID μSA51,153Bingham County, Idaho51,153Spokane–Spokane Valley–Coeur d'Alene, WA-ID CSA799,876191,864 (ID)Spokane–Spokane Valley, WA MSA608,012Spokane County, Washington558,344Stevens County, Washington49,668Coeur d'Alene, ID MSA191,864Kootenai County, Idaho191,864noneTwin Falls, ID MSA 123,901Twin Falls County, Idaho97,539Jerome County, Idaho26,362Pocatello, ID MSA91,591Bannock County, Idaho91,591Sandpoint, ID μSA54,420Bonner County, Idaho54,420Burley, ID μSA49,308Cassia County, Idaho26,397Minidoka County, Idaho22,911Lewiston, ID-WA MSA65,45042,905 (ID)Nez Perce County, Idaho42,905Asotin County, Washington22,545Pullman–Moscow, WA-ID CSA90,35441,842 (ID)Pullman, WA μSA48,512Whitman County, Washington48,512Moscow, ID μSA41,842Latah County, Idaho41,842noneHailey, ID μSA32,436Blaine County, Idaho25,517Lincoln County, Idaho5,603Camas County, Idaho1,316Logan, UT-ID MSA160,88915,889 (ID)Cache County, Utah145,000Franklin County, Idaho15,889Jackson, WY-ID μSA36,58713,254 (ID)Teton County, Wyoming23,333Teton County, Idaho13,254Salt Lake City–Provo–Orem, UT-ID CSA2,906,6475,085 (ID)Salt Lake City–Murray, UT MSA1,308,377Salt Lake County, Utah1,220,916Tooele County, Utah87,461Provo–Orem–Lehi, UT MSA773,426Utah County, Utah759,859Juab County, Utah13,567Ogden, UT MSA672,784Davis County, Utah381,227Weber County, Utah278,174Morgan County, Utah13,383Heber, UT μSA81,655Summit County, Utah43,141Wasatch County, Utah38,514Brigham City, UT-ID μSA70,4055,085 (ID)Box Elder County, Utah65,320Oneida County, Idaho5,085noneIdaho County, Idaho17,874Gooding County, Idaho16,446Shoshone County, Idaho14,130Boundary County, Idaho13,997Valley County, Idaho12,831Washington County, Idaho11,583Benewah County, Idaho10,508Clearwater County, Idaho9,118Lemhi County, Idaho8,474Power County, Idaho8,246Caribou County, Idaho7,252Bear Lake County, Idaho6,727Adams County, Idaho5,013Custer County, Idaho4,636Lewis County, Idaho3,704Clark County, Idaho783State of Idaho2,029,733
+The 17 core-based statistical areas of the State of Idaho2025 rankPrimary statistical areaPopulation2025 estimateChange2020 CensusChange2010 CensusBoise City, ID MSACoeur d'Alene, ID MSAIdaho Falls, ID MSATwin Falls, ID MSAPocatello, ID MSARexburg, ID μSASandpoint, ID μSABlackfoot, ID μSABurley, ID μSALewiston, ID-WA MSA (ID)Moscow, ID μSAHailey, ID μSAMountain Home, ID μSAOntario, OR-ID μSA (ID)Logan, UT-ID MSA (ID)Jackson, WY-ID μSA (ID)Brigham City, UT-ID μSA (ID)Brigham City, UT-ID μSAJackson, WY-ID μSALewiston, ID-WA MSALogan, UT-ID MSAOntario, OR-ID μSA
+The five combined statistical areas of the State of Idaho2025 rankCombined statistical areaPopulation2025 estimateChange2020 CensusChange2010 Census Boise City–Mountain Home–Ontario, ID-OR CSA (ID)Idaho Falls–Rexburg–Blackfoot, ID CSASpokane–Spokane Valley–Coeur d'Alene, WA-ID CSA (ID)Pullman–Moscow, WA-ID CSA (ID)Salt Lake City–Provo–Orem, UT-ID CSA (ID)Boise City–Mountain Home–Ontario, ID-OR CSAPullman–Moscow, WA-ID CSASalt Lake City–Provo–Orem, UT-ID CSASpokane–Spokane Valley–Coeur d'Alene, WA-ID CSA
See also
Geography of Idaho Demographics of Idaho
Notes
References
External links
Office of Management and Budget United States Census Bureau