- Lead
- 112,941
- Total
- 422,216
- vs nation
- R+25.3
Idaho 2nd Congressional District
▦ precinct · ▥ counties · ▢ no spatial detail
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 96,299
- Total
- 420,057
- vs nation
- R+27.4
- Lead
- 84,558
- Total
- 345,945
- vs nation
- R+26.5
- Lead
- 100,124
- Total
- 336,507
- vs nation
- R+33.6
- Lead
- 72,176
- Total
- 334,055
- vs nation
- R+28.9
- Lead
- 110,644
- Total
- 304,459
- vs nation
- R+33.9
- Lead
- 95,792
- Total
- 257,694
- vs nation
- R+37.7
- Lead
- 45,024
- Total
- 256,309
- vs nation
- R+26.1
Key facts
- 2024 presidential margin
- R+26.7MIT Election Lab
- Population
- 919,5772024 5-year
- Population density
- 21 / sq mi2024 5-year · TIGER/Line
- Land area
- 43,245 sq miTIGER/Line
- Median household income
- $75,8052024 5-year
- White (non-Hispanic)
- 77.7%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 14.2%2024 5-year
- Peak Democratic margin
- D+68.9 in 1896MIT Election Lab
- Peak Republican margin
- R+51.2 in 1984MIT Election Lab
- Most similar
- Congressional District 1, ID · twin score 82.7
presidential history
Party record book
Idaho 2nd 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
84.5%
11,577 votes · D+68.9 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 64.7%
Republican
Ronald Reagan1984
75.0%
166,864 votes · R+51.2 · modeled estimate
Runner-up · Ronald Reagan, 1980 · 69.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
154,880votes
36.9% of the vote · R+22.9 · modeled estimate
Runner-up · Kamala Harris, 2024 · 148,411 votes
Republican
Donald Trump2024
261,352votes
61.9% of the vote · R+26.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 251,179 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
+75.0pts D vs U.S.
Place D+68.9 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +13.2 pts
Republican
Benjamin Harrison1892
+45.4pts R vs U.S.
Place R+43.8 · U.S. D+1.7 · a third-party candidate carried the Place · modeled estimate
Runner-up · George W. Bush, 2000 · +37.7 pts
Current officeholders
Federal officeholders only. State and local officeholders are planned for the next data pass.
On the ballot
Republican Mike Simpson holds the seat and is contesting it.
Primary held May 19, 2026. Akashic does not yet carry the nominees for this contest.
How the seat has run
| Year | U.S. House | President | Ran ahead |
|---|---|---|---|
| 2024 | R+30.4Michael K. Simpson | R+26.7 | +3.7 |
| 2022 | R+27.2Michael K Simpson | — | — |
| 2020 | R+32.3Michael K Simpson | R+22.9 | — |
| 2018 | R+21.3Mike Simpson | — | — |
“Ran ahead” is how far the winning party’s House candidate ran ahead of that party’s presidential margin in the same district. A dash means the House race and the presidential figure were measured on different district lines, so the two cannot be subtracted — both are still shown unchanged.
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.
Covering roughly the eastern two-thirds of Idaho, this sprawling rural district has delivered presidential margins exceeding R+25 in each of the last three cycles, anchored by agricultural communities and small cities with little urban counterweight.
Across the recorded series it reached a Democratic high of 68.9 points in 1896 and a Republican high of 51.2 points in 1984. Between 2020 and 2024 the district moved 3.8 points toward the Republican candidate; the 2024 margin was 26.7 points.
A population of 919,577, a 78% non-Hispanic-white share, and a median household income of $75,805 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 1 and Congressional District 3.
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.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Idaho 2nd Congressional District. Akashic. https://akashic.app/cd/1602/. Accessed May 20, 2026. License: CC BY 4.0.