Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Boundary County, Idaho has 8,331 active registered voters — 80.0% Republican, 4.5% Democratic, and 14.1% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 005 | 1,472 | 710 | 48.23% |
| 2 | 004 | 2,140 | 1,007 | 47.06% |
| 3 | 001 | 1,149 | 537 | 46.74% |
| 4 | 002 | 899 | 418 | 46.5% |
| 5 | 007 | 1,088 | 505 | 46.42% |
| 6 | 006 | 1,583 | 731 | 46.18% |
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 Boundary County voted for president
Election results are public records.
Boundary County at a glance.
Boundary County had an estimated 14,040 residents in July 2024, the 25th most populous of Idaho's 44 counties, up 16.4% since the 2020 census. Of those, 10,777 are 18 or older, the voting-age population, and 23.4% are 65 or older. Its 8,331 active registered voters equal about 77.3% of that voting-age population.
It covers 1,269 square miles of land (11 people per square mile), and 71.4% of residents live outside any incorporated city or town. The largest cities and towns are Bonners Ferry (2,788) and Moyie Springs (1,225). The American Community Survey (2020-2024) puts it at a median age of 43.7, a median household income of $67,237, 24.0% of adults 25 and older holding a bachelor's degree or higher and 75.3% of occupied homes owned by the people living in them.
In 2024, 7,110 votes were cast for president, about 66.0% of the voting-age population; the Democratic ticket took 16.1% and the Republican ticket 81.5%. The two-party margin moved from R+33.6 in 2008 to R+65.4 in 2024.
- Population (2024 estimate)
- 14,040
- Population (2020 census base)
- 12,060
- Voting-age population (18+)
- 10,777
- Active voters per 100 adults
- 77.3
- Residents 65 and older
- 23.4%
- People per square mile
- 11
- Living outside incorporated places
- 71.4%
- Land area
- 1,269 sq mi
- Median age
- 43.7
- Median household income
- $67,237
- Adults 25+ with a bachelor's degree
- 24.0%
- Owner-occupied homes
- 75.3%
Largest cities and towns
- Bonners Ferry 2,788
- Moyie Springs 1,225
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 16.1% | 81.5% | R+65.4 | 7,110 |
| 2020 | 19.3% | 78.2% | R+58.9 | 6,313 |
| 2016 | 18.1% | 73.6% | R+55.5 | 5,150 |
| 2012 | 27.0% | 69.1% | R+42.1 | 4,544 |
| 2008 | 31.4% | 65.0% | R+33.6 | 4,733 |
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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