Treasure Valley's fastest-growing metro tests Idaho's deep-red baseline
Boise's rapid in-migration from California and the Pacific Northwest has introduced new demographic layers to a metro that still votes Republican by double digits, making it a bellwether for how growth reshapes reliably conservative Western cities.
| County | Pop. | Margin | Dem | Rep | Total | Share |
|---|---|---|---|---|---|---|
| Ada | 519K | R+10.3 | 116,116 | 143,759 | 267,887 | 17.2% |
| Ada | 426K | R+10.3 | 116,116 | 143,759 | 267,887 | 17.2% |
| Ada | 369K | R+10.3 | 116,116 | 143,759 | 267,887 | 17.2% |
| Ada | 301K | R+10.3 | 116,116 | 143,759 | 267,887 | 17.2% |
| Canyon | 251K | R+46.8 | 25,669 | 72,755 | 100,588 | 6.5% |
| Canyon | 203K | R+46.8 | 25,669 | 72,755 | 100,588 | 6.5% |
| Canyon | 177K | R+46.8 | 25,669 | 72,755 | 100,588 | 6.5% |
| Canyon | 131K | R+46.8 | 25,669 | 72,755 | 100,588 | 6.5% |
| Gem | 21K | R+66.0 | 1,699 | 8,707 | 10,627 | 0.7% |
| Gem | 17K | R+66.0 | 1,699 | 8,707 | 10,627 | 0.7% |
| Gem | 16K | R+66.0 | 1,699 | 8,707 | 10,627 | 0.7% |
| Gem | 15K | R+66.0 | 1,699 | 8,707 | 10,627 | 0.7% |
| Owyhee | 13K | R+67.8 | 756 | 4,101 | 4,937 | 0.3% |
| Owyhee | 11K | R+67.8 | 756 | 4,101 | 4,937 | 0.3% |
| Owyhee | 11K | R+67.8 | 756 | 4,101 | 4,937 | 0.3% |
| Owyhee | 11K | R+67.8 | 756 | 4,101 | 4,937 | 0.3% |
| Boise | 8K | R+54.5 | 1,065 | 3,727 | 4,886 | 0.3% |
| Boise | 7K | R+54.5 | 1,065 | 3,727 | 4,886 | 0.3% |
| Boise | 7K | R+54.5 | 1,065 | 3,727 | 4,886 | 0.3% |
| Boise | 7K | R+54.5 | 1,065 | 3,727 | 4,886 | 0.3% |
| Group | Boise City, ID | National |
|---|---|---|
▶White (Non-Hispanic)(13) | 81.1% | 57.4% |
▶Hispanic / Latino(19) | 12.6% | 19.3% |
Multiracial / Other | 2.8% | 4.0% |
▶Asian(6) | 1.8% | 6.0% |
▶Black / African American(13) | 0.9% | 12.2% |
▶Native American / Alaska Native(4) | 0.8% | 0.9% |
▶Middle Eastern / North African(11) | 0.6% | 0.9% |
▶Native Hawaiian / Pacific Islander(6) | 0.1% | 0.2% |
| Tradition | % Pop | % Adherents | US Pop | US Adherents |
|---|---|---|---|---|
| 15.7% | 36.7% | — | — | |
LDS (Mormon) | 14.2% | 33.0% | — | — |
| 12.2% | 28.5% | — | — | |
| 11.2% | 26.1% | — | — | |
| 3.7% | 8.6% | — | — | |
Non-religiousPopulation | 57.1% | — | — | — |
Who lives in the Boise City, ID metro area? 2,520,063 residents across 20 counties.
Scale, voting-age share, and this geography's footprint inside the national electorate.
Income, attainment, and ownership indicators that often shape coalition structure and turnout behavior.
Age structure, language use, and nativity signals that explain how this geography differs from state and nation.
| Offices | Margin A | Margin B | Split |
|---|---|---|---|
| Senate vs Governor | R+16.4 | R+32.5 | 16.1pp |