- Lead
- 20,107
- Total
- 33,810
- vs nation
- R+58.0
Idaho 10th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 12,240
- Total
- 24,661
- vs nation
- R+54.1
- Lead
- 9,479
- Total
- 18,548
- vs nation
- R+53.2
- Lead
- 8,617
- Total
- 16,844
- vs nation
- R+55.0
- Lead
- 8,087
- Total
- 16,201
- vs nation
- R+57.2
- Lead
- 9,051
- Total
- 14,592
- vs nation
- R+59.6
- Lead
- 6,708
- Total
- 11,409
- vs nation
- R+59.3
- Lead
- 4,788
- Total
- 10,460
- vs nation
- R+54.3
Key facts
- 2024 presidential margin
- R+59.5MIT Election Lab
- Population
- 53,4982024 5-year
- Population density
- 325 / sq mi2024 5-year · TIGER/Line
- Land area
- 165 sq miTIGER/Line
- Median household income
- $92,9932024 5-year
- White (non-Hispanic)
- 79.6%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 13.0%2024 5-year
- Peak Democratic margin
- D+28.9 in 1896MIT Election Lab
- Peak Republican margin
- R+72.2 in 1928MIT Election Lab
- Most similar
- State Senate District 8, ID · twin score 91.8
presidential history
Party record book
Idaho 10th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 · 34 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
William J. Bryan1896
64.4%
163 votes · D+28.9 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 48.3%
Republican
Herbert Hoover1928
85.5%
1,814 votes · R+72.2 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 83.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
6,514votes
19.3% of the vote · R+59.5 · modeled estimate
Runner-up · Joe Biden, 2020 · 5,864 votes
Republican
Donald Trump2024
26,621votes
78.7% of the vote · R+59.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 18,104 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
William J. Bryan1896
+34.9pts D vs U.S.
Place D+28.9 · U.S. R+6.1 · modeled estimate
Runner-up · John W. Davis, 1924 · −13.9 pts
Republican
George W. Bush2004
+59.6pts R vs U.S.
Place R+62.0 · U.S. R+2.5 · modeled estimate
Runner-up · George W. Bush, 2000 · +59.3 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2024 | R | 29.7%7,023 | 70.3%16,653 | 23,676 |
| 2020 | R | 34.0%6,770 | 66.0%13,161 | 19,931 |
With a 2024 presidential margin of R+59.4, this district ranks among the most skewed in Idaho's upper chamber. Its sparse population and rural geography have produced consistent, lopsided Republican margins at every level of the ballot.
Across the recorded series it reached a Democratic high of 28.9 points in 1896 and a Republican high of 72.2 points in 1928. Between 2020 and 2024 the district moved 9.8 points toward the Republican candidate; the 2024 margin was 59.5 points.
A population of 53,498, a 80% non-Hispanic-white share, and a median household income of $92,993 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 8 and State Senate District 30.
The state-senate districts 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.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Idaho 10th State Senate District. Akashic. https://akashic.app/sld-upper/16010/. Accessed May 20, 2026. License: CC BY 4.0.