- Lead
- 10,599
- Total
- 25,360
- vs nation
- R+40.3
Idaho 8th State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 9,383
- Total
- 24,827
- vs nation
- R+42.2
- Lead
- 8,241
- Total
- 20,093
- vs nation
- R+43.1
- Lead
- 5,728
- Total
- 18,723
- vs nation
- R+34.4
- Lead
- 5,717
- Total
- 19,909
- vs nation
- R+36.0
- Lead
- 7,806
- Total
- 18,720
- vs nation
- R+39.2
- Lead
- 7,122
- Total
- 16,329
- vs nation
- R+44.1
- Lead
- 3,180
- Total
- 16,457
- vs nation
- R+27.8
Key facts
- 2024 presidential margin
- R+41.8MIT Election Lab
- Population
- 52,2972024 5-year
- Population density
- 3.9 / sq mi2024 5-year · TIGER/Line
- Land area
- 13,562 sq miTIGER/Line
- Median household income
- $69,7672024 5-year
- White (non-Hispanic)
- 78.6%2024 5-year
- Black
- 1.3%2024 5-year
- Hispanic / Latino
- 11.8%2024 5-year
- Peak Democratic margin
- D+68.0 in 1896MIT Election Lab
- Peak Republican margin
- R+49.0 in 1984MIT Election Lab
- Most similar
- State Senate District 30, WY · twin score 95.4
presidential history
Party record book
Idaho 8th 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
84.0%
1,992 votes · D+68.0 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 64.2%
Republican
Ronald Reagan1984
73.9%
9,796 votes · R+49.0 · modeled estimate
Runner-up · George W. Bush, 2004 · 70.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
7,384votes
29.7% of the vote · R+37.8 · modeled estimate
Runner-up · Kamala Harris, 2024 · 7,131 votes
Republican
Donald Trump2024
17,730votes
69.9% of the vote · R+41.8 · modeled estimate
Runner-up · Donald Trump, 2020 · 16,767 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
+74.1pts D vs U.S.
Place D+68.0 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +27.0 pts
Republican
George W. Bush2000
+44.1pts R vs U.S.
Place R+43.6 · U.S. D+0.5 · modeled estimate
Runner-up · Donald Trump, 2016 · +43.1 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.
With a 2024 presidential margin of R+41.8, this district ranks among the most solidly red constituencies in the state, leaving Democrats with little competitive foothold in statewide or legislative contests here.
Across the recorded series it reached a Democratic high of 68.0 points in 1896 and a Republican high of 49.0 points in 1984. Between 2020 and 2024 the district moved 4.0 points toward the Republican candidate; the 2024 margin was 41.8 points.
A population of 52,297, a 79% non-Hispanic-white share, and a median household income of $69,767 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 30 and State Senate District 9.
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 8th State Senate District. Akashic. https://akashic.app/sld-upper/16008/. Accessed May 20, 2026. License: CC BY 4.0.