# Idaho statistical areas

The U.S. State of Idaho 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 2023, the largest of these is the Boise City-Mountain Home-Ontario, ID-OR CSA, anchored by Idaho's capital and largest city, Boise.

## Background

The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
The OMB defines a core-based statistical area (commonly referred to as a CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population, "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". The OMB further divides core-based statistical areas based on population into metropolitan statistical areas (MSAs) for those with at least 50,000 and micropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.
The OMB defines a combined statistical area (CSA) as two or more adjacent core-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%. The primary statistical areas (PSAs) include all combined statistical areas and any core-based statistical area that is not a constituent of a combined statistical area.

## Table

The 22 United States statistical areas and 44 counties of the State of Idaho :
| Combined statistical area | 2023 population (est.) | Core-based statistical area | 2023 population (est.) | County | 2023 population (est.) |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Boise City, ID MSA | 824,657 | Ada County, Idaho | 524,673 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Boise City, ID MSA | 824,657 | Canyon County, Idaho | 257,674 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Boise City, ID MSA | 824,657 | Gem County, Idaho | 21,071 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Boise City, ID MSA | 824,657 | Owyhee County, Idaho | 12,722 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Boise City, ID MSA | 824,657 | Boise County, Idaho | 8,517 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Ontario, OR-ID μSA | 59,323 27,279 (ID) | Malheur County, Oregon | 32,044 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Ontario, OR-ID μSA | 59,323 27,279 (ID) | Payette County, Idaho | 27,279 |
| Boise City-Mountain Home-Ontario, ID-OR CSA | 913,704 881,660 (ID) | Mountain Home, ID μSA | 29,724 | Elmore County, Idaho | 29,724 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Idaho Falls, ID MSA | 168,322 | Bonneville County, Idaho | 131,366 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Idaho Falls, ID MSA | 168,322 | Jefferson County, Idaho | 34,198 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Idaho Falls, ID MSA | 168,322 | Butte County, Idaho | 2,758 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Rexburg, ID μSA | 68,743 | Madison County, Idaho | 54,547 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Rexburg, ID μSA | 68,743 | Fremont County, Idaho | 14,196 |
| Idaho Falls-Rexburg-Blackfoot, ID CSA | 287,460 | Blackfoot, ID μSA | 50,395 | Bingham County, Idaho | 50,395 |
| Spokane-Spokane Valley-Coeur d'Alene, WA-ID CSA | 785,302 185,010 (ID) | Spokane-Spokane Valley, WA MSA | 600,292 | Spokane County, Washington | 551,455 |
| Spokane-Spokane Valley-Coeur d'Alene, WA-ID CSA | 785,302 185,010 (ID) | Spokane-Spokane Valley, WA MSA | 600,292 | Stevens County, Washington | 48,837 |
| Spokane-Spokane Valley-Coeur d'Alene, WA-ID CSA | 785,302 185,010 (ID) | Coeur d'Alene, ID MSA | 185,010 | Kootenai County, Idaho | 185,010 |
| none | none | Twin Falls, ID MSA | 120,635 | Twin Falls County, Idaho | 95,156 |
| none | none | Twin Falls, ID MSA | 120,635 | Jerome County, Idaho | 25,479 |
| none | none | Pocatello, ID MSA | 90,400 | Bannock County, Idaho | 90,400 |
| none | none | Sandpoint, ID μSA | 52,547 | Bonner County, Idaho | 52,547 |
| none | none | Burley, ID μSA | 48,176 | Cassia County, Idaho | 25,696 |
| none | none | Burley, ID μSA | 48,176 | Minidoka County, Idaho | 22,480 |
| none | none | Lewiston, ID-WA MSA | 65,536 42,987 (ID) | Nez Perce County, Idaho | 42,987 |
| none | none | Lewiston, ID-WA MSA | 65,536 42,987 (ID) | Asotin County, Washington | 22,549 |
| Pullman-Moscow, WA-ID CSA | 89,313 41,301 (ID) | Pullman, WA μSA | 48,012 | Whitman County, Washington | 48,012 |
| Pullman-Moscow, WA-ID CSA | 89,313 41,301 (ID) | Moscow, ID μSA | 41,301 | Latah County, Idaho | 41,301 |
| none | none | Hailey, ID μSA | 31,723 | Blaine County, Idaho | 25,041 |
| none | none | Hailey, ID μSA | 31,723 | Lincoln County, Idaho | 5,450 |
| none | none | Hailey, ID μSA | 31,723 | Camas County, Idaho | 1,232 |
| none | none | Logan, UT-ID MSA | 157,887 15,494 (ID) | Cache County, Utah | 142,393 |
| none | none | Logan, UT-ID MSA | 157,887 15,494 (ID) | Franklin County, Idaho | 15,494 |
| none | none | Jackson, WY-ID μSA | 35,781 12,549 (ID) | Teton County, Wyoming | 23,232 |
| none | none | Jackson, WY-ID μSA | 35,781 12,549 (ID) | Teton County, Idaho | 12,549 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Salt Lake City-Murray, UT MSA | 1,267,864 | Salt Lake County, Utah | 1,185,813 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Salt Lake City-Murray, UT MSA | 1,267,864 | Tooele County, Utah | 82,051 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Provo-Orem-Lehi, UT MSA | 732,197 | Utah County, Utah | 719,174 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Provo-Orem-Lehi, UT MSA | 732,197 | Juab County, Utah | 13,023 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Ogden, UT MSA | 658,133 | Davis County, Utah | 373,207 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Ogden, UT MSA | 658,133 | Weber County, Utah | 271,926 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Ogden, UT MSA | 658,133 | Morgan County, Utah | 13,000 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Heber, UT μSA | 79,903 | Summit County, Utah | 42,759 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Heber, UT μSA | 79,903 | Wasatch County, Utah | 37,144 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Brigham City, UT-ID μSA | 67,637 4,953 (ID) | Box Elder County, Utah | 62,684 |
| Salt Lake City-Provo-Orem, UT-ID CSA | 2,805,734 4,953 (ID) | Brigham City, UT-ID μSA | 67,637 4,953 (ID) | Oneida County, Idaho | 4,953 |
| none | none | none | none | Idaho County, Idaho | 17,890 |
| none | none | none | none | Gooding County, Idaho | 16,061 |
| none | none | none | none | Shoshone County, Idaho | 14,026 |
| none | none | none | none | Boundary County, Idaho | 13,557 |
| none | none | none | none | Valley County, Idaho | 12,644 |
| none | none | none | none | Washington County, Idaho | 11,425 |
| none | none | none | none | Benewah County, Idaho | 10,369 |
| none | none | none | none | Clearwater County, Idaho | 9,214 |
| none | none | none | none | Lemhi County, Idaho | 8,441 |
| none | none | none | none | Power County, Idaho | 8,253 |
| none | none | none | none | Caribou County, Idaho | 7,219 |
| none | none | none | none | Bear Lake County, Idaho | 6,766 |
| none | none | none | none | Adams County, Idaho | 4,903 |
| none | none | none | none | Custer County, Idaho | 4,523 |
| none | none | none | none | Lewis County, Idaho | 3,739 |
| none | none | none | none | Clark County, Idaho | 801 |
| State of Idaho | State of Idaho | State of Idaho | State of Idaho | State of Idaho | 1,964,726 |

## Core-based statistical areas

The following table provides the in-state population ranking of each CBSA along with its rate of population change over time.
The 17 core-based statistical areas of the State of Idaho :
| 2023 rank | Primary statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Primary statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 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 |

## Combined statistical areas

The following table provides the in-state population ranking of each CSA along with its rate of population change over time.
The five combined statistical areas of the State of Idaho :
| 2023 rank | Combined statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Combined statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 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 |