† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
3 counties by 2024 margin · County returns · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupIdaho Falls, IDIdahoUnited States
English25.9%19.3%9.5%
German13.1%16.5%12.5%
American6.6%5.3%5.3%
Irish5.8%9.5%9.4%
Scottish3.3%3.2%1.3%
Norwegian2.7%2.4%—
Swedish2.6%1.9%—
Danish2.1%——
Mexican11.3%11.0%11.3%
Puerto Rican0.4%0.3%1.8%
Spanish0.4%0.4%—
Cuban0.2%—0.7%
Guatemalan0.2%0.2%0.5%
Spaniard0.2%0.4%—
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
Idaho Falls, ID
Idaho
United States
Median age
33.6
37.6
39.1
Age 18–24
8.5%
9.8%
9.2%
Age 65 and older
13.6%
17.1%
17.2%
Household economy
Measure
Idaho Falls, ID
Idaho
United States
Median household income
$80,171
$77,800
$84,427
Poverty rate
9.9%
10.7%
12.5%
Bachelor's degree or higher (25+)
31.7%
31.8%
35.6%
Languages at home
Measure
Idaho Falls, ID
Idaho
United States
Speaks a non-English language at home
10.0%
11.0%
22.3%
Spanish
8.7%
8.1%
13.6%
Religious landscape
Measure
Idaho Falls, ID
Idaho
United States
Catholic
5.2%
11.1%
18.6%
Evangelical Protestant
4.2%
12.4%
16.5%
Unclaimed / not counted
29.6%
50.2%
51.5%
Latter-day Saints
58.9%
22.1%
2.0%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
Idaho Falls, ID
presidential history
Presidential margin, 1912–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1912
−10.3%
1916
+17.7%
1920
−39.4%
1924
−41.5%
1928
−17.7%
1932
+25.4%
1936
+41.5%
1940
+18.7%
1944
+11.9%
1948
+9.9%
1952
−35.8%
1956
−28.3%
1960
−8.2%
1964
−5.9%
1968
−38.8%
1972
−41.5%
1976
−34.1%
1980
−63.0%
1984
−67.2%
1988
−52.4%
1992
−27.7%
1996
−34.8%
2000
−55.6%
2004
−59.1%
2008
−47.7%
2012
−56.7%
2016
−45.7%
2020
−50.3%
2024
−51.9%
DemocraticRepublican
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
R
22.4%Harris16,534
74.3%Trump54,802
3.3%
R+51.9
R+1.6
R+50.4
73,750
R
23.1%Biden16,103
73.4%Trump51,106
3.5%
R+50.3
R+4.6
R+54.7
69,622
R
17.7%Clinton10,066
63.3%Trump36,049
19.0%
R+45.7
D+11.1
R+47.7
56,913
R
20.5%Obama11,464
77.3%Romney43,172
2.2%
R+56.7
R+9.0
R+60.6
55,880
R
25.0%Obama13,376
72.7%McCain38,930
2.3%
R+47.7
D+11.4
R+55.0
53,554
R
19.8%Kerry9,761
78.9%Bush38,828
1.2%
R+59.1
R+3.5
R+56.6
49,183
R
20.3%Gore8,689
75.9%Bush32,522
3.8%
R+55.6
R+20.8
R+56.1
42,852
R
25.9%Clinton10,947
60.7%Dole25,643
13.4%
R+34.8
R+7.0
R+43.3
42,244
R
19.1%Clinton8,425
46.9%Bush20,630
34.0%
R+27.7
D+24.7
R+33.3
43,995
R
22.9%Dukakis8,751
75.3%Bush28,807
1.8%
R+52.4
D+14.7
R+44.7
38,240
R
16.0%Mondale6,049
83.2%Reagan31,407
0.7%
R+67.2
R+4.2
R+49.0
37,738
R
15.6%Carter6,309
78.5%Reagan31,850
5.9%
R+63.0
R+28.8
R+53.2
40,567
R
31.3%Carter9,638
65.5%Ford20,143
3.2%
R+34.1
D+7.3
R+36.2
30,765
R
19.0%McGovern5,301
60.4%Nixon16,905
20.6%
R+41.5
R+2.7
R+18.3
27,972
R
24.5%Humphrey6,654
63.3%Nixon17,200
12.2%
R+38.8
R+32.9
R+38.1
27,167
R
47.0%Johnson12,546
53.0%Goldwater14,125
0.0%
R+5.9
D+2.3
R+28.5
26,671
R
45.9%Kennedy12,220
54.1%Nixon14,416
0.0%
R+8.2
D+20.1
R+8.4
26,636
R
35.8%Stevenson8,168
64.2%Eisenhower14,621
0.0%
R+28.3
D+7.5
R+12.9
22,789
R
32.1%Stevenson6,684
67.9%Eisenhower14,138
0.0%
R+35.8
R+45.7
R+25.0
20,828
D
54.3%Truman7,825
44.4%Dewey6,401
1.3%
D+9.9
R+2.1
D+5.4
14,415
D
55.9%Roosevelt7,549
43.9%Dewey5,937
0.2%
D+11.9
R+6.8
D+4.4
13,513
D
59.3%Roosevelt8,970
40.6%Willkie6,139
0.2%
D+18.7
R+22.8
D+8.8
15,135
D
70.0%Roosevelt8,761
28.5%Landon3,562
1.6%
D+41.5
D+16.2
D+17.3
12,520
D
61.9%Roosevelt7,380
36.5%Hoover4,354
1.6%
D+25.4
D+43.1
D+7.6
11,926
R
41.1%Smith3,761
58.7%Hoover5,382
0.2%
R+17.7
D+23.8
R+0.2
9,161
R
10.3%Davis932
51.8%Coolidge4,682
37.9%
R+41.5
R+2.0
R+16.3
9,042
R
30.3%Cox2,476
69.7%Harding5,700
0.0%
R+39.4
R+57.1
R+13.2
8,176
D
57.2%Wilson3,947
39.6%Hughes2,729
3.2%
D+17.7
D+27.9
D+14.5
6,896
R
28.4%Wilson864
38.7%Taft1,176
32.9%
R+10.3
—
R+29.8
3,038
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Congressional elections · 2 Senate races
U.S. Senate
Source · MIT Election Lab (MEDSL), Senate. CC-BY 4.0.
Year
Won
Democratic
Republican
Total
2022
R
19.4%8,816
72.0%32,758
45,526
2020
R
23.0%15,782
72.0%49,312
68,504
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 Republican.
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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
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.
