- Lead
- 19,513
- Total
- 32,901
- vs nation
- R+57.8
Idaho 3rd State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 15,098
- Total
- 29,586
- vs nation
- R+55.5
- Lead
- 10,679
- Total
- 21,191
- vs nation
- R+52.5
- Lead
- 8,219
- Total
- 19,278
- vs nation
- R+46.5
- Lead
- 7,002
- Total
- 19,768
- vs nation
- R+42.7
- Lead
- 7,517
- Total
- 17,395
- vs nation
- R+40.8
- Lead
- 5,884
- Total
- 13,963
- vs nation
- R+42.7
- Lead
- 2,664
- Total
- 12,141
- vs nation
- R+30.5
Key facts
- 2024 presidential margin
- R+59.3MIT Election Lab
- Population
- 51,9532024 5-year
- Population density
- 217 / sq mi2024 5-year · TIGER/Line
- Land area
- 240 sq miTIGER/Line
- Median household income
- $91,5552024 5-year
- White (non-Hispanic)
- 88.3%2024 5-year
- Black
- 0.3%2024 5-year
- Hispanic / Latino
- 4.5%2024 5-year
- Peak Democratic margin
- D+51.3 in 1896MIT Election Lab
- Peak Republican margin
- R+59.3 in 2024MIT Election Lab
- Most similar
- State Senate District 5, ID · twin score 96.5
presidential history
Party record book
Idaho 3rd 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
75.6%
410 votes · D+51.3 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 58.3%
Republican
Donald Trump2024
78.6%
25,861 votes · R+59.3 · modeled estimate
Runner-up · Donald Trump, 2020 · 74.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
6,814votes
23.0% of the vote · R+51.0 · modeled estimate
Runner-up · Kamala Harris, 2024 · 6,348 votes
Republican
Donald Trump2024
25,861votes
78.6% of the vote · R+59.3 · modeled estimate
Runner-up · Donald Trump, 2020 · 21,912 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
+57.4pts D vs U.S.
Place D+51.3 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +4.6 pts
Republican
Donald Trump2024
+57.8pts R vs U.S.
Place R+59.3 · U.S. R+1.5 · modeled estimate
Runner-up · Donald Trump, 2020 · +55.5 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 exceeding 54 points, this sparsely populated northern Idaho district ranks among the most one-sided state senate constituencies in the country, reflecting the region's deep rural and small-town conservative character.
Across the recorded series it reached a Democratic high of 51.3 points in 1896 and a Republican high of 59.3 points in 2024. Between 2020 and 2024 the district moved 8.3 points toward the Republican candidate; the 2024 margin was 59.3 points.
A population of 51,953, a 88% non-Hispanic-white share, and a median household income of $91,555 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 5 and State Senate District 2.
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 3rd State Senate District. Akashic. https://akashic.app/sld-upper/16003/. Accessed May 20, 2026. License: CC BY 4.0.