Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Caribou County, Idaho has 3,916 active registered voters — 81.5% Republican, 3.3% Democratic, and 13.9% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | BANCROFT | 492 | 234 | 47.56% |
| 2 | GRACE 2 | 550 | 259 | 47.09% |
| 3 | GRACE 1 | 621 | 272 | 43.8% |
| 4 | SODA 4 | 531 | 231 | 43.5% |
| 5 | SODA 2 | 488 | 208 | 42.62% |
| 6 | SODA 3 | 565 | 233 | 41.24% |
| 7 | SODA 1 | 532 | 210 | 39.47% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
How Caribou County voted for president
Election results are public records.
Caribou County at a glance.
Caribou County had an estimated 7,239 residents in July 2024, the 35th most populous of Idaho's 44 counties, up 3.0% since the 2020 census. Of those, 5,271 are 18 or older, the voting-age population, and 19.0% are 65 or older. Its 3,916 active registered voters equal about 74.3% of that voting-age population.
It covers 1,764 square miles of land (4.1 people per square mile), and 38.9% of residents live outside any incorporated city or town. The largest cities and towns are Soda Springs (3,162), Grace (945) and Bancroft (314). The American Community Survey (2020-2024) puts it at a median age of 38.5, a median household income of $68,782, 16.8% of adults 25 and older holding a bachelor's degree or higher and 81.6% of occupied homes owned by the people living in them.
In 2024, 3,456 votes were cast for president, about 65.6% of the voting-age population; the Democratic ticket took 12.9% and the Republican ticket 84.1%. The two-party margin moved from R+63.7 in 2008 to R+71.2 in 2024.
- Population (2024 estimate)
- 7,239
- Population (2020 census base)
- 7,030
- Voting-age population (18+)
- 5,271
- Active voters per 100 adults
- 74.3
- Residents 65 and older
- 19.0%
- People per square mile
- 4.1
- Living outside incorporated places
- 38.9%
- Land area
- 1,764 sq mi
- Median age
- 38.5
- Median household income
- $68,782
- Adults 25+ with a bachelor's degree
- 16.8%
- Owner-occupied homes
- 81.6%
Largest cities and towns
- Soda Springs 3,162
- Grace 945
- Bancroft 314
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 12.9% | 84.1% | R+71.2 | 3,456 |
| 2020 | 12.6% | 85.1% | R+72.5 | 3,416 |
| 2016 | 8.9% | 75.0% | R+66.1 | 3,035 |
| 2012 | 12.6% | 85.5% | R+72.9 | 3,050 |
| 2008 | 16.7% | 80.4% | R+63.7 | 3,302 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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