Idaho 13th State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1896–2024 · 33 presidential cycles
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
William J. Bryan1896
78.6%
323 votes · D+57.2 · modeled estimate
Runner-up · Woodrow Wilson, 1912 · 60.8%
Republican
George W. Bush2004
73.2%
9,679 votes · R+48.0 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 73.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
6,408votes
30.6% of the vote · R+35.4 · modeled estimate
Runner-up · Kamala Harris, 2024 · 6,325 votes
Republican
Donald Trump2024
15,170votes
68.8% of the vote · R+40.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 13,818 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
+63.3pts D vs U.S.
Place D+57.2 · U.S. R+6.1 · modeled estimate
Runner-up · William J. Bryan, 1900 · +12.7 pts
Republican
George W. Bush2004
+45.6pts R vs U.S.
Place R+48.0 · U.S. R+2.5 · modeled estimate
Runner-up · George W. Bush, 2000 · +44.6 pts
current representation
Current officeholders
RBrian LenneyState Senate · 13
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2024
R
25.1%5,579
74.9%16,681
22,260
2020
R
29.7%5,420
70.3%12,828
18,248
Idaho Senate District 13 posts one of the state's sharpest leftward presidential margins, reflecting the dense, younger, and college-educated population concentrated around Boise State University and the city's urban core.
Across the recorded series it reached a Democratic high of 57.2 points in 1896 and a Republican high of 48.0 points in 2004. Between 2020 and 2024 the district moved 4.7 points toward the Republican candidate; the 2024 margin was 40.1 points.
A population of 53,581, a 70% non-Hispanic-white share, and a median household income of $75,870 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 12 and State Senate District 25.
Akashic
Political twins — state-senate districts
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.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Idaho 13th State Senate District. Akashic. https://akashic.app/sld-upper/16013/. Accessed May 20, 2026. License: CC BY 4.0.
How did Idaho 13th State Senate District vote in 2024?
In 2024, Idaho 13th State Senate District voted Republican by 40.1 points (R+40.1), carried by the Republican candidate. Out of 22,046 votes cast, 6,325 went Democratic and 15,170 went Republican.
When did Idaho 13th State Senate District last vote Democratic?
The most recent presidential election in which Idaho 13th State Senate District voted Democratic was 1940.
How many people live in Idaho 13th State Senate District?
Idaho 13th State Senate District has a population of 53,581 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Idaho 13th State Senate District?
Median household income in Idaho 13th State Senate District is $75,870 — below the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Idaho 13th State Senate District?
Akashic tracks 38 presidential elections in Idaho 13th State Senate District from 1876 to 2024. Of those, 7 went Democratic and 25 went Republican.