Boise County, Idaho
Precinct data
Results by precinct
6 precincts · 4,867 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -3030 | 337 | 1,163 | 12 | 1,512 | 22.3% | 76.9% | R+54.6 |
|---|---|---|---|---|---|---|---|
| Precinct -4040 | 199 | 1,068 | 13 | 1,280 | 15.5% | 83.4% | R+67.9 |
| Precinct -7070 | 239 | 774 | 23 | 1,036 | 23.1% | 74.7% | R+51.6 |
| Precinct -5050 | 180 | 439 | 17 | 636 | 28.3% | 69.0% | R+40.7 |
| Precinct -8080 | 71 | 185 | 5 | 261 | 27.2% | 70.9% | R+43.7 |
| Precinct -6060 | 39 | 98 | 5 | 142 | 27.5% | 69.0% | R+41.5 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −42.6% |
| 1896 | +58.2% |
| 1900 | +10.0% |
| 1904 | −22.1% |
| 1908 | −1.2% |
| 1912 | +4.2% |
| 1916 | +21.3% |
| 1920 | −22.4% |
| 1924 | −21.1% |
| 1928 | −14.4% |
| 1932 | +31.8% |
| 1936 | +34.6% |
| 1940 | +16.1% |
| 1944 | +9.7% |
| 1948 | +4.5% |
| 1952 | −35.7% |
| 1956 | −33.3% |
| 1960 | −2.7% |
| 1964 | +4.2% |
| 1968 | −30.3% |
| 1972 | −41.2% |
| 1976 | −21.5% |
| 1980 | −33.4% |
| 1984 | −47.2% |
| 1988 | −24.8% |
| 1992 | −12.5% |
| 1996 | −23.6% |
| 2000 | −41.7% |
| 2004 | −43.4% |
| 2008 | −31.6% |
| 2012 | −35.7% |
| 2016 | −49.7% |
| 2020 | −47.3% |
| 2024 | −54.2% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 19.6%1,346 | 63.2%4,344 | 6,874 |
| 2020 | R | 26.0%1,247 | 69.4%3,323 | 4,791 |
Registered voters
By party of registration, over time
Registration leans Republican; the presidential vote runs 8.9 points more Republican.
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2018 | 4,688 | 341 | 2,875 | 1,410 | 62 |
| 2020 | 5,677 | 505 | 3,604 | 1,480 | 88 |
| 2022 | 5,790 | 460 | 3,994 | 1,245 | 91 |
| 2024 | 6,156 | 457 | 4,342 | 1,246 | 111 |
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
+54 net domestic migration · 2025
Net +1,722 over 2011–2025 · gain loss
Arrivals reported $104,006 in average income, against $86,659 for residents who stayed — 20% higher. (IRS SOI, 2022–23)
The places arrivals came from lean R+16.8 on average — 37 points more Democratic-leaning than Boise County, ID itself (R+54.2).
Where arrivals came from lean of each source
- Ada County, ID143R+10.3
- Canyon County, ID31R+46.6
Where departures went households, 2022–23
- Ada County, ID146
- Canyon County, ID43
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −8 |
| 2012 | −190 |
| 2013 | −66 |
| 2014 | +72 |
| 2015 | +183 |
| 2016 | +133 |
| 2017 | +259 |
| 2018 | +277 |
| 2019 | +174 |
| 2021 | +531 |
| 2022 | +214 |
| 2023 | +105 |
| 2024 | −16 |
| 2025 | +54 |
Boise County's roughly 6,600 residents are spread across forested mountain terrain northeast of the capital, producing some of Idaho's most lopsided federal-election results — a pattern that has held consistently across multiple cycles.
Across the recorded series it reached a Democratic high of 58.2 points in 1896 and a Republican high of 54.2 points in 2024. Between 2020 and 2024 the county moved 6.9 points toward the Republican candidate; the 2024 margin was 54.2 points.
A population of 8,273, a 84% non-Hispanic-white share, and a median household income of $78,774 describe the county. The county's voting pattern over the last decade is most similar to that of Ravalli County and Wheeler County.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Boise County, Idaho. Akashic. https://akashic.app/county/16015/. Accessed May 20, 2026. License: CC BY 4.0.