- Lead
- 13,393
- Total
- 22,057
- vs nation
- R+59.2
Idaho 30th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 12,185
- Total
- 21,509
- vs nation
- R+61.1
- Lead
- 8,737
- Total
- 17,855
- vs nation
- R+51.0
- Lead
- 10,361
- Total
- 18,964
- vs nation
- R+58.5
- Lead
- 8,544
- Total
- 18,566
- vs nation
- R+53.3
- Lead
- 9,885
- Total
- 17,971
- vs nation
- R+52.5
- Lead
- 8,018
- Total
- 15,925
- vs nation
- R+50.9
- Lead
- 4,321
- Total
- 16,372
- vs nation
- R+34.9
Key facts
- 2024 presidential margin
- R+60.7MIT Election Lab
- Population
- 50,5662024 5-year
- Population density
- 12 / sq mi2024 5-year · TIGER/Line
- Land area
- 4,330 sq miTIGER/Line
- Median household income
- $76,1672024 5-year
- White (non-Hispanic)
- 73.7%2024 5-year
- Black
- 0.3%2024 5-year
- Hispanic / Latino
- 16.7%2024 5-year
- Peak Democratic margin
- D+72.8 in 1896MIT Election Lab
- Peak Republican margin
- R+60.7 in 2024MIT Election Lab
- Most similar
- State House District 28, ID · twin score 96.9
presidential history
Party record book
Idaho 30th State House 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
86.4%
1,232 votes · D+72.8 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1936 · 62.4%
Republican
Donald Trump2024
79.1%
17,456 votes · R+60.7 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 78.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
6,079votes
50.3% of the vote · D+0.5 · modeled estimate
Runner-up · John F. Kennedy, 1960 · 5,844 votes
Republican
Donald Trump2024
17,456votes
79.1% of the vote · R+60.7 · modeled estimate
Runner-up · Donald Trump, 2020 · 16,497 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
+78.9pts D vs U.S.
Place D+72.8 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +15.4 pts
Republican
Donald Trump2020
+61.1pts R vs U.S.
Place R+56.7 · U.S. D+4.5 · modeled estimate
Runner-up · Donald Trump, 2024 · +59.2 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 | 16.1%3,385 | 83.9%17,646 | 21,031 |
| 2020 | R | 19.7%2,582 | 80.3%10,550 | 13,132 |
With a 2024 presidential margin of R+60.7, this district ranks among the most one-sided in the state. Its political consistency reflects the rural, small-town demographics typical of Idaho's interior counties.
Across the recorded series it reached a Democratic high of 72.8 points in 1896 and a Republican high of 60.7 points in 2024. Between 2020 and 2024 the district moved 4.1 points toward the Republican candidate; the 2024 margin was 60.7 points.
A population of 50,566, a 74% non-Hispanic-white share, and a median household income of $76,167 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 28 and State House District 27.
The state-house 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 30th State House District. Akashic. https://akashic.app/sld-lower/16030/. Accessed May 20, 2026. License: CC BY 4.0.