TheU.S.State of Idaho currently has 22statistical areas that have been delineated by theOffice of Management and Budget (OMB). On July 21, 2023, the OMB delineated fivecombined statistical areas, sevenmetropolitan statistical areas, and 10micropolitan statistical areas in Idaho.[1] As of 2023, the largest of these is theBoise City-Mountain Home-Ontario, ID-OR CSA, anchored by Idaho's capital and largest city,Boise.
TheOffice of Management and Budget (OMB) has designated more than 1,000statistical areas for theUnited States andPuerto Rico.[2] These statistical areas are important geographic delineations of population clusters used by the OMB, theUnited States Census Bureau, planning organizations, and federal, state, and local government entities.
The OMB defines acore-based statistical area (commonly referred to as aCBSA) as thecounty or counties (orcounty-equivalents) surrounding at least one densely-settled core of at least 10,000 population,[2] "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core".[2] The OMB further divides core-based statistical areas based on population intometropolitan statistical areas (MSAs) for those with at least 50,000 andmicropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.[2]
The OMB defines acombined statistical area (CSA) as two or more adjacentcore-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%.[2] Theprimary statistical areas (PSAs) include allcombined statistical areas and anycore-based statistical area that is not a constituent of a combined statistical area.
| 2023 rank | Primary statistical area[1] | Population | ||||
|---|---|---|---|---|---|---|
| 2023 estimate[3] | Change | 2020 Census[4] | Change | 2010 Census[5] | ||
| 1 | Boise City, ID MSA | 824,657 | +7.84% | 764,718 | +24.03% | 616,561 |
| 2 | Coeur d'Alene, ID MSA | 185,010 | +7.96% | 171,362 | +23.73% | 138,494 |
| 3 | Idaho Falls, ID MSA | 168,322 | +6.92% | 157,429 | +18.13% | 133,265 |
| 4 | Twin Falls, ID MSA | 120,635 | +5.56% | 114,283 | +14.74% | 99,604 |
| 5 | Pocatello, ID MSA | 90,400 | +3.89% | 87,018 | +5.04% | 82,839 |
| 6 | Rexburg, ID μSA | 68,743 | +3.68% | 66,301 | +30.57% | 50,778 |
| 7 | Sandpoint, ID μSA | 52,547 | +11.54% | 47,110 | +15.25% | 40,877 |
| 8 | Blackfoot, ID μSA | 50,395 | +5.01% | 47,992 | +5.23% | 45,607 |
| 9 | Burley, ID μSA | 48,176 | +4.12% | 46,268 | +7.55% | 43,021 |
| 10 | Lewiston, ID-WA MSA(ID) | 42,987 | +2.13% | 42,090 | +7.19% | 39,265 |
| 11 | Moscow, ID μSA | 41,301 | +4.51% | 39,517 | +6.10% | 37,244 |
| 12 | Hailey, ID μSA | 31,723 | +4.09% | 30,476 | +10.02% | 27,701 |
| 13 | Mountain Home, ID μSA | 29,724 | +3.69% | 28,666 | +6.02% | 27,038 |
| 14 | Ontario, OR-ID μSA(ID) | 27,279 | +7.46% | 25,386 | +12.21% | 22,623 |
| 15 | Logan, UT-ID MSA(ID) | 15,494 | +9.16% | 14,194 | +11.01% | 12,786 |
| 16 | Jackson, WY-ID μSA(ID) | 12,549 | +7.90% | 11,630 | +14.36% | 10,170 |
| 17 | Brigham City, UT-ID μSA(ID) | 4,953 | +8.52% | 4,564 | +6.49% | 4,286 |
| Brigham City, UT-ID μSA | 67,637 | +8.69% | 62,230 | +14.69% | 54,261 | |
| Jackson, WY-ID μSA | 35,781 | +2.35% | 34,961 | +11.11% | 31,464 | |
| Lewiston, ID-WA MSA | 65,536 | +1.80% | 64,375 | +5.73% | 60,888 | |
| Logan, UT-ID MSA | 157,887 | +7.15% | 147,348 | +17.46% | 125,442 | |
| Ontario, OR-ID μSA | 157,887 | +7.15% | 147,348 | +17.46% | 125,442 | |
| 2023 rank | Combined statistical area[1] | Population | ||||
|---|---|---|---|---|---|---|
| 2023 estimate[3] | Change | 2020 Census[4] | Change | 2010 Census[5] | ||
| 1 | Boise City-Mountain Home-Ontario, ID-OR CSA(ID) | 881,660 | +7.68% | 818,770 | +22.90% | 666,222 |
| 2 | Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | +5.79% | 271,722 | +18.32% | 229,650 |
| 3 | Spokane-Spokane Valley-Coeur d'Alene, WA-ID CSA(ID) | 185,010 | +7.96% | 171,362 | +23.73% | 138,494 |
| 4 | Pullman-Moscow, WA-ID CSA(ID) | 41,301 | +4.51% | 39,517 | +6.10% | 37,244 |
| 5 | Salt Lake City-Provo-Orem, UT-ID CSA(ID) | 4,953 | +8.52% | 4,564 | +6.49% | 4,286 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 | +7.45% | 850,341 | +21.91% | 697,535 | |
| Pullman-Moscow, WA-ID CSA | 89,313 | +2.08% | 87,490 | +6.67% | 82,020 | |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 | +3.70% | 2,705,693 | +18.88% | 2,275,982 | |
| Spokane-Spokane Valley-Coeur d'Alene, WA-ID CSA | 785,302 | +3.72% | 757,146 | +15.91% | 653,246 | |
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