- Lead
- 217,333
- Total
- 481,939
- vs nation
- R+43.6
Idaho 1st Congressional District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 170,798
- Total
- 448,048
- vs nation
- R+42.6
- Lead
- 134,732
- Total
- 344,310
- vs nation
- R+41.2
- Lead
- 108,000
- Total
- 320,235
- vs nation
- R+37.6
- Lead
- 94,396
- Total
- 324,399
- vs nation
- R+36.4
- Lead
- 117,493
- Total
- 293,988
- vs nation
- R+37.5
- Lead
- 102,508
- Total
- 243,927
- vs nation
- R+42.5
- Lead
- 46,128
- Total
- 235,402
- vs nation
- R+28.1
Key facts
- 2024 presidential margin
- R+45.1MIT Election Lab
- Population
- 919,5292024 5-year
- Population density
- 23 / sq mi2024 5-year · TIGER/Line
- Land area
- 39,400 sq miTIGER/Line
- Median household income
- $79,5772024 5-year
- White (non-Hispanic)
- 80.0%2024 5-year
- Black
- 0.6%2024 5-year
- Hispanic / Latino
- 11.8%2024 5-year
- Peak Democratic margin
- D+46.8 in 1896MIT Election Lab
- Peak Republican margin
- R+46.1 in 1892MIT Election Lab
- Most similar
- Congressional District 2, WV · twin score 91.5
presidential history
Party record book
Idaho 1st Congressional 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
73.4%
11,558 votes · D+46.8 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 60.9%
Republican
Donald Trump2024
71.4%
343,894 votes · R+45.1 · modeled estimate
Runner-up · George W. Bush, 2004 · 69.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
132,141votes
29.5% of the vote · R+38.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 126,561 votes
Republican
Donald Trump2024
343,894votes
71.4% of the vote · R+45.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 302,939 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
+52.8pts D vs U.S.
Place D+46.8 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +10.1 pts
Republican
Benjamin Harrison1892
+47.7pts R vs U.S.
Place R+46.1 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · Donald Trump, 2024 · +43.6 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Anchored by the Idaho Panhandle and the Treasure Valley's rural counties, ID-01 delivered a 45.1-point presidential margin in 2024, placing it among the most consistently one-sided congressional districts in the country.
Across the recorded series it reached a Democratic high of 46.8 points in 1896 and a Republican high of 46.1 points in 1892. Between 2020 and 2024 the district moved 7.0 points toward the Republican candidate; the 2024 margin was 45.1 points.
A population of 919,529, a 80% non-Hispanic-white share, and a median household income of $79,577 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 2 and Congressional District (at Large).
The congressional 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 1st Congressional District. Akashic. https://akashic.app/cd/1601/. Accessed May 20, 2026. License: CC BY 4.0.