combined metro areaBoise City-Mountain Home-Ontario, ID-OR
presidential margin
2004–2024 · Democratic minus Republican
2004R+34.0
2008R+17.8
2012R+21.5
2016R+22.9
2020R+18.3
2024R+24.9
full record · 1892 → 2024
presidential returns
2024 turnout 64.2% of 657,668 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
152,864
258,008
11,435
422,307
657,668
64.2%
2020
158,265
232,008
12,659
402,932
582,498
69.2%
2016
100,724
172,178
38,835
311,737
518,899
60.1%
2012
108,389
170,394
8,964
287,747
478,656
60.1%
2008
114,688
165,932
7,646
288,266
452,441
63.7%
2004
81,605
167,406
3,056
252,067
426,226†
59.1%
† Citizen voting-age population estimated for prior cycles; 2004 predates the ACS and is extrapolated. Source: ACS 5-year, table B05003.
——
D+60R+60
8 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
GroupBoise City-Mountain Home-Ontario, ID-ORUnited States
English17.8%9.5%
German16.7%12.5%
Irish10.2%9.4%
American4.6%5.3%
Italian3.5%4.8%
Scottish3.0%1.3%
Norwegian2.6%—
Swedish1.6%—
Mexican12.8%11.3%
Spanish0.4%—
Puerto Rican0.4%1.8%
Spaniard0.4%—
Guatemalan0.3%0.5%
Colombian0.2%0.4%
Peruvian0.2%—
Salvadoran0.2%0.7%
Asian Indian0.3%1.4%
Chinese0.3%1.3%
Filipino0.2%0.9%
Vietnamese0.2%0.6%
Korean0.2%0.4%
Japanese0.2%0.2%
Aztec0.2%—
African American†0.7%9.9%
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
Boise City-Mountain Home-Ontario, ID-OR
United States
Median age
37.5
39.1
Age 18–24
9.0%
9.2%
Age 65 and older
16.2%
17.2%
Household economy
Measure
Boise City-Mountain Home-Ontario, ID-OR
United States
Median household income
$83,328
$84,427
Poverty rate
9.5%
12.5%
Bachelor's degree or higher (25+)
34.9%
35.6%
Languages at home
Measure
Boise City-Mountain Home-Ontario, ID-OR
United States
Speaks a non-English language at home
12.8%
22.3%
Spanish
8.9%
13.6%
Religious landscape
Measure
Boise City-Mountain Home-Ontario, ID-OR
United States
Catholic
13.0%
18.6%
Evangelical Protestant
11.7%
16.5%
Unclaimed / not counted
54.7%
51.5%
Latter-day Saints
15.0%
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.
Boise City-Mountain Home-Ontario, ID-OR
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
1892
−36.9%
1896
+50.5%
1900
−0.3%
1904
−39.3%
1908
−11.1%
1912
+0.9%
1916
+7.5%
1920
−29.5%
1924
−30.5%
1928
−44.0%
1932
+13.0%
1936
+24.4%
1940
+1.1%
1944
−9.0%
1948
−9.8%
1952
−41.6%
1956
−33.1%
1960
−21.2%
1964
−9.0%
1968
−37.6%
1972
−45.0%
1976
−27.3%
1980
−40.0%
1984
−48.4%
1988
−29.7%
1992
−18.8%
1996
−20.9%
2000
−35.6%
2004
−34.0%
2008
−17.8%
2012
−21.5%
2016
−22.9%
2020
−18.3%
2024
−24.9%
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
36.2%Harris152,864
61.1%Trump258,008
2.7%
R+24.9
R+6.6
R+23.4
422,307
R
39.3%Biden158,265
57.6%Trump232,008
3.1%
R+18.3
D+4.6
R+22.8
402,932
R
32.3%Clinton100,724
55.2%Trump172,178
12.5%
R+22.9
R+1.4
R+25.0
311,737
R
37.7%Obama108,389
59.2%Romney170,394
3.1%
R+21.5
R+3.8
R+25.4
287,747
R
39.8%Obama114,688
57.6%McCain165,932
2.7%
R+17.8
D+16.3
R+25.0
288,266
R
32.4%Kerry81,605
66.4%Bush167,406
1.2%
R+34.0
D+1.5
R+31.6
252,067
R
29.5%Gore59,771
65.0%Bush131,931
5.5%
R+35.6
R+14.7
R+36.1
202,939
R
33.9%Clinton65,852
54.7%Dole106,384
11.4%
R+20.9
R+2.1
R+29.4
194,398
R
27.3%Clinton50,007
46.0%Bush84,412
26.7%
R+18.8
D+10.9
R+24.3
183,428
R
34.1%Dukakis51,207
63.8%Bush95,881
2.2%
R+29.7
D+18.7
R+22.0
150,387
R
25.2%Mondale37,383
73.6%Reagan109,324
1.3%
R+48.4
R+8.4
R+30.2
148,634
R
25.3%Carter39,884
65.4%Reagan102,944
9.3%
R+40.0
R+12.7
R+30.3
157,507
R
35.0%Carter41,916
62.3%Ford74,607
2.7%
R+27.3
D+17.7
R+29.4
119,786
R
22.5%McGovern24,241
67.5%Nixon72,634
10.0%
R+45.0
R+7.4
R+21.8
107,611
R
24.7%Humphrey23,663
62.2%Nixon59,716
13.1%
R+37.6
R+28.6
R+36.9
95,993
R
45.5%Johnson42,802
54.5%Goldwater51,277
0.0%
R+9.0
D+12.2
R+31.6
94,087
R
39.4%Kennedy38,189
60.6%Nixon58,693
0.0%
R+21.2
D+11.9
R+21.3
96,882
R
33.4%Stevenson28,411
66.6%Eisenhower56,525
0.0%
R+33.1
D+8.5
R+17.7
84,936
R
29.1%Stevenson24,934
70.7%Eisenhower60,519
0.2%
R+41.6
R+31.8
R+30.8
85,595
R
43.8%Truman27,940
53.6%Dewey34,212
2.7%
R+9.8
R+0.8
R+14.3
63,853
R
45.1%Roosevelt26,470
54.1%Dewey31,747
0.7%
R+9.0
R+10.1
R+16.5
58,651
D
50.4%Roosevelt31,903
49.3%Willkie31,179
0.3%
D+1.1
R+23.3
R+8.8
63,281
D
58.7%Roosevelt30,545
34.3%Landon17,835
7.1%
D+24.4
D+11.4
D+0.2
52,060
D
53.7%Roosevelt24,897
40.7%Hoover18,855
5.6%
D+13.0
D+57.0
R+4.7
46,333
R
27.4%Smith10,052
71.4%Hoover26,159
1.2%
R+44.0
R+13.5
R+26.5
36,634
R
15.9%Davis5,717
46.4%Coolidge16,684
37.7%
R+30.5
R+1.0
R+5.3
35,985
R
34.9%Cox11,995
64.4%Harding22,122
0.7%
R+29.5
R+37.0
R+3.3
34,348
D
50.2%Wilson15,539
42.7%Hughes13,210
7.1%
D+7.5
D+6.6
D+4.4
30,949
O
29.5%Wilson7,503
28.5%Taft7,269
42.0%
Roosevelt +12.5
D+12.1
R+18.6
25,462
R
40.6%Bryan9,219
51.7%Taft11,752
7.7%
R+11.1
D+28.2
R+1.6
22,723
R
25.3%Parker4,236
64.6%Roosevelt10,816
10.1%
R+39.3
R+39.1
R+19.6
16,736
R
48.2%Bryan6,173
48.5%McKinley6,206
3.3%
R+0.3
R+50.8
D+7.3
12,799
D
74.7%Bryan5,900
24.2%McKinley1,913
1.0%
D+50.5
D+87.4
D+56.6
7,893
O
4.8%Cleveland265
41.7%Harrison2,318
53.6%
Weaver +11.9
—
R+38.6
5,562
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 Republican.
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.
