Boise City-Mountain Home-Ontario, ID-OR · 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
74.7%
5,900 votes · D+50.5
Runner-up · Franklin D. Roosevelt, 1936 · 58.7%
Republican
Ronald Reagan1984
73.6%
109,324 votes · R+48.4
Runner-up · Herbert Hoover, 1928 · 71.4%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
158,265votes
39.3% of the vote · R+18.3
Runner-up · Kamala Harris, 2024 · 152,864 votes
Republican
Donald Trump2024
258,008votes
61.1% of the vote · R+24.9
Runner-up · Donald Trump, 2020 · 232,008 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
+56.6pts D vs U.S.
Place D+50.5 · U.S. R+6.1
Runner-up · William J. Bryan, 1900 · +7.3 pts
Republican
Benjamin Harrison1892
+38.6pts R vs U.S.
Place R+36.9 · U.S. D+1.7 · a third-party candidate carried the Place
Runner-up · Richard Nixon, 1968 · +36.9 pts
U.S. House elections · 3 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
On a multi-state Place, each row sums votes cast in the separate U.S. House races held inside the Place that year. It is a geographic vote total, not one contest or a seat tally.
Boise City-Mountain Home-Ontario, ID-OR · how this place’s counties split between candidates in each party’s presidential nominating contest, cycle by cycle. A primary is a contest inside one party, so it has no Democratic–Republican margin and is not part of the general-election record above.
Akashic reports votes cast, not delegates awarded. The two can disagree: Clinton led the 2008 national primary popular vote by less than half a point and did not win the nomination.
Primary returns are published at county grain and there is no roll-up above it. Each cell counts how many of this place’s counties a candidate led — a count of records, not a vote total. Who led the place as a whole is not knowable from these returns, because county rows carry a leader and a lead but no per-candidate votes.
Presidential nominating contests in Boise City-Mountain Home-Ontario, ID-OR, by party and cycle.
Party
2008
2012
2016
2020
2024
Democratic
Obama7Clinton112,604 votes · 8 of 8 countiescaucus + primary
○no contest record
Sanders812,733 votes · 8 of 8 countiescaucus + primary
Biden7Sanders159,926 votes · 8 of 8 countiesprimary
○no contest record
Republicannot ingested
○no contest record
○no contest record
○no contest record
○no contest record
○no contest record
○no contest record — Akashic holds no result for that party and cycle here. It is not a claim that no contest was held. Telling apart a contest that was cancelled, one that went uncontested, and one simply not yet ingested needs a nominating-contest calendar, which is a separate ingest from results and does not exist yet.
Republican presidential primaries are not yet ingested — the Republican series runs from 1856 and is in scope. The row is kept so its absence is visible: a Democratic-only panel would otherwise read as though no one else held a contest.
Akashic carries 10 states for 2012 and 3 states for 2024. Cycles in which an incumbent president seeks renomination are thin by nature — few states run a contested primary — so a sparse column is politics, not a hole in the record.
County returns carry a leader and a lead over the runner-up, and nothing more. The full candidate field with vote shares is published at state grain — follow a cycle above to the state contest for it.
voter registration
Registered voters
By party of registration, over time
Party registration · 2024R+37.9
vs
Presidential vote · 2024R+24.9
Registration leans Republican; the presidential vote runs 13 points more Democratic than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
† Some years predate full county coverage; a flagged year sums only the counties reporting it.
Voter registration in Boise City-Mountain Home-Ontario, ID-OR
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2018 (partial)
377,534
57,533
174,701
140,143
5,157
2020 (partial)
458,506
78,112
217,112
156,499
6,783
2022
482,976
75,845
252,624
146,208
8,299
2024
514,151
79,900
274,513
150,864
8,874
domestic migration
Who moves in and out
Net domestic migration over time
+13,917 net domestic migration · 2025
20112025
Net +156,762 over 2011–2025 · gain loss
Domestic migration in Boise City-Mountain Home-Ontario, ID-OR in Boise City-Mountain Home-Ontario, ID-OR: net domestic migration by year
Year
Net domestic migration
2011
+2,441
2012
+4,059
2013
+5,923
2014
+7,664
2015
+5,412
2016
+11,414
2017
+14,747
2018
+16,442
2019
+16,889
2021
+26,726
2022
+12,280
2023
+8,491
2024
+10,357
2025
+13,917
Boise City-Mountain Home-Ontario, ID-OR sits in the Northern Rockies. In 2024 it voted Republican.
Across the recorded series it reached a Democratic high of 50.5 points in 1896 and a Republican high of 48.4 points in 1984. Between 2020 and 2024 the region moved 6.6 points toward the Republican candidate; the 2024 margin was 24.9 points.
A population of 899,161, a 76% non-Hispanic-white share, and a median household income of $83,328 describe the region. The region's voting pattern over the last decade is most similar to that of Idaho Falls-Rexburg-Blackfoot, ID and Harrisonburg-Staunton-Stuarts Draft, VA.
Akashic
Political twins — combined metros
The combined metros 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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Boise City-Mountain Home-Ontario, ID-OR, Idaho. Akashic. https://akashic.app/csa/147/. Accessed May 20, 2026. License: CC BY 4.0.
How did Boise City-Mountain Home-Ontario, ID-OR, Idaho vote in 2024?
In 2024, Boise City-Mountain Home-Ontario, ID-OR, Idaho voted Republican by 24.9 points (R+24.9), carried by the Republican candidate. Out of 422,307 votes cast, 152,864 went Democratic and 258,008 went Republican.
When did Boise City-Mountain Home-Ontario, ID-OR, Idaho last vote Democratic?
The most recent presidential election in which Boise City-Mountain Home-Ontario, ID-OR, Idaho voted Democratic was 1940.
How many people live in Boise City-Mountain Home-Ontario, ID-OR, Idaho?
Boise City-Mountain Home-Ontario, ID-OR, Idaho has a population of 899,161 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Boise City-Mountain Home-Ontario, ID-OR, Idaho?
Median household income in Boise City-Mountain Home-Ontario, ID-OR, Idaho is $83,328 — above the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Boise City-Mountain Home-Ontario, ID-OR, Idaho?
Akashic tracks 34 presidential elections in Boise City-Mountain Home-Ontario, ID-OR, Idaho from 1892 to 2024. Of those, 5 went Democratic and 27 went Republican.
