A high-desert metro where LDS affiliation shapes voting patterns at scale
Idaho Falls anchors eastern Idaho's Snake River Plain and posts some of the state's most lopsided Republican margins, driven by a predominantly Latter-day Saint population and an economy tied to the Idaho National Laboratory and agriculture.
| County | Pop. | Margin | Dem | Rep | Total | Share |
|---|---|---|---|---|---|---|
| Bonneville | 130K | R+45.6 | 14,458 | 40,053 | 56,081 | 19.1% |
| Bonneville | 109K | R+45.6 | 14,458 | 40,053 | 56,081 | 19.1% |
| Bonneville | 96K | R+45.6 | 14,458 | 40,053 | 56,081 | 19.1% |
| Bonneville | 83K | R+45.6 | 14,458 | 40,053 | 56,081 | 19.1% |
| Jefferson | 33K | R+73.2 | 1,891 | 13,481 | 15,830 | 5.4% |
| Jefferson | 27K | R+73.2 | 1,891 | 13,481 | 15,830 | 5.4% |
| Jefferson | 23K | R+73.2 | 1,891 | 13,481 | 15,830 | 5.4% |
| Jefferson | 19K | R+73.2 | 1,891 | 13,481 | 15,830 | 5.4% |
| Butte | 3K | R+72.5 | 185 | 1,268 | 1,493 | 0.5% |
| Butte | 3K | R+72.5 | 185 | 1,268 | 1,493 | 0.5% |
| Butte | 3K | R+72.5 | 185 | 1,268 | 1,493 | 0.5% |
| Butte | 3K | R+72.5 | 185 | 1,268 | 1,493 | 0.5% |
| Group | Idaho Falls, ID | National |
|---|---|---|
▶White (Non-Hispanic)(13) | 85.4% | 57.4% |
▶Hispanic / Latino(15) | 11.0% | 19.3% |
Multiracial / Other | 1.8% | 4.0% |
▶Asian(6) | 0.7% | 6.0% |
▶Native American / Alaska Native(6) | 0.6% | 0.9% |
▶Black / African American(5) | 0.4% | 12.2% |
▶Middle Eastern / North African(6) | 0.1% | 0.9% |
| Tradition | % Pop | % Adherents | US Pop | US Adherents |
|---|---|---|---|---|
| 56.6% | 84.6% | — | — | |
LDS (Mormon) | 55.9% | 83.7% | — | — |
| 4.9% | 7.4% | — | — | |
| 4.1% | 6.1% | — | — | |
| 1.1% | 1.6% | — | — | |
| 0.2% | 0.3% | — | — | |
Non-religiousPopulation | 33.1% | — | — | — |
Who lives in the Idaho Falls, ID metro area? 530,513 residents across 12 counties.
27% of adults hold a bachelor's degree — 6pp below the national average. Places with similar education levels vote R+3 on average nationally.
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+52.6 | R+56.6 | 4.0pp |