Idaho Falls, ID · 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 Idaho Falls, ID, by party and cycle.
○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+58.9
vs
Presidential vote · 2024R+51.9
Registration leans Republican; the presidential vote runs 7.0 points more Democratic than the rolls.
DemocraticRepublicanUnaffiliatedOther parties
Voter registration in Idaho Falls, ID
Year
Total registered
Democratic
Republican
Unaffiliated
Other
2018
66,878
4,364
40,944
20,904
666
2020
78,872
6,530
48,886
22,488
968
2022
75,967
5,864
50,287
18,793
1,023
2024
81,380
6,341
54,258
19,640
1,141
domestic migration
Who moves in and out
Net domestic migration over time
+1,501 net domestic migration · 2025
20112025
Net +14,858 over 2011–2025 · gain loss
Domestic migration in Idaho Falls, ID in Idaho Falls, ID: net domestic migration by year
Year
Net domestic migration
2011
−546
2012
−223
2013
−830
2014
−330
2015
+126
2016
+1,466
2017
+1,710
2018
+1,658
2019
+1,775
2021
+3,778
2022
+1,732
2023
+1,576
2024
+1,465
2025
+1,501
Idaho Falls anchors eastern Idaho's Snake River Plain and posts some of the state's most lopsided Republican margins, driven by a predominantly Latter-day Saint population and an economy tied to the Idaho National Laboratory and agriculture.
Across the recorded series it reached a Democratic high of 41.5 points in 1936 and a Republican high of 67.2 points in 1984. Between 2020 and 2024 the metro moved 1.6 points toward the Republican candidate; the 2024 margin was 51.9 points.
A population of 165,361, a 81% non-Hispanic-white share, and a median household income of $80,171 describe the metro. The metro's voting pattern over the last decade is most similar to that of Brigham City, UT-ID and St. George, UT.
Akashic
Political twins — metros
The 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 →
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Idaho Falls, ID. Akashic. https://akashic.app/cbsa/26820/. Accessed May 20, 2026. License: CC BY 4.0.
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In 2024, Idaho Falls, ID voted Republican by 51.9 points (R+51.9), carried by the Republican candidate. Out of 73,750 votes cast, 16,534 went Democratic and 54,802 went Republican.
When did Idaho Falls, ID last vote Democratic?
The most recent presidential election in which Idaho Falls, ID voted Democratic was 1948.
How many people live in Idaho Falls, ID?
Idaho Falls, ID has a population of 165,361 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Idaho Falls, ID?
Median household income in Idaho Falls, ID is $80,171 — below the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Idaho Falls, ID?
Akashic tracks 34 presidential elections in Idaho Falls, ID from 1892 to 2024. Of those, 6 went Democratic and 23 went Republican.
