Harry S. Truman carried Idaho D+2.7.

Harry S. Truman (D) vs Thomas E. Dewey (R) in Idaho, 1948. The state ran 1.8 points more Republican than the nation (D+4.5 nationally).

Nominees: Harry S. Truman (D) · Thomas E. Dewey (R) · Strom Thurmond (States' Rights Democratic)

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Idaho result

214,816 votes counted

Truman (D)

107,370

50.0%

Dewey (R)

101,514

47.3%

Thurmond + others

5,932

2.8%

Margin

D+2.7

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1948 presidential election

Idaho, 1948

TrumanD+2.7

How it voted

Share of the 1948 vote

Harry S. Truman ✓Democratic	50.0%	107,370
Thomas E. DeweyRepublican	47.3%	101,514
Strom ThurmondStates' Rights	2.8%	5,932

D+60

R+60

44 counties, each filled by 1948 D-vs-R margin. Hover any county for its result.

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Idaho's presidential margins

1892–2024, the 1948 contest in context

Idaho's presidential margins

Year	Margin (D minus R)
1892	−44.2%
1896	+56.8%
1900	+3.8%
1904	−40.4%
1908	−16.9%
1912	+1.1%
1916	+10.9%
1920	−31.3%
1924	−30.8%
1928	−29.3%
1932	+20.4%
1936	+29.8%
1940	+9.1%
1944	+3.5%
1948	+2.7%
1952	−31.0%
1956	−22.4%
1960	−7.6%
1964	+1.8%
1968	−26.1%
1972	−38.2%
1976	−22.8%
1980	−41.3%
1984	−46.0%
1988	−26.1%
1992	−13.6%
1996	−18.5%
2000	−39.5%
2004	−38.1%
2008	−25.4%
2012	−31.9%
2016	−31.8%
2020	−30.8%
2024	−36.5%

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County results — 1948

44 counties; every row links to the county's full page.

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County	Won	Margin	Democratic	Republican	Total
Ada County	R	−13.9%	11,253	14,972	26,705
Adams County	D	+3.5%	647	603	1,274
Bannock County	D	+26.3%	9,679	5,580	15,560
Bear Lake County	D	+2.3%	1,664	1,590	3,280
Benewah County	D	+20.2%	1,590	1,038	2,731
Bingham County	D	+0.5%	3,197	3,162	6,448
Blaine County	D	+11.0%	1,182	945	2,162
Boise County	D	+4.5%	479	437	940
Bonner County	D	+4.3%	2,916	2,666	5,867
Bonneville County	D	+8.8%	5,382	4,499	10,001
Boundary County	D	+5.7%	1,029	910	2,099
Butte County	D	+1.7%	426	412	846
Camas County	R	−1.9%	278	289	575
Canyon County	R	−9.8%	7,903	9,700	18,363
Caribou County	D	+3.0%	475	447	930
Cassia County	R	−5.3%	2,178	2,424	4,671
Clark County	R	−22.5%	165	262	432
Clearwater County	D	+29.5%	1,571	820	2,549
Custer County	D	+1.0%	625	612	1,257
Elmore County	D	+29.4%	1,589	854	2,503
Franklin County	R	−6.9%	1,763	2,028	3,813
Fremont County	D	+6.2%	2,014	1,777	3,811
Gem County	D	+4.1%	1,724	1,585	3,426
Gooding County	R	−6.7%	1,844	2,111	4,015
Idaho County	D	+12.1%	2,300	1,790	4,218
Jefferson County	D	+14.8%	2,017	1,490	3,568
Jerome County	R	−0.1%	2,124	2,128	4,305
Kootenai County	D	+9.9%	5,284	4,265	10,262
Latah County	D	+0.1%	3,810	3,805	7,889
Lemhi County	R	−8.9%	864	1,037	1,938
Lewis County	D	+41.8%	1,224	487	1,763
Lincoln County	R	−6.4%	748	851	1,617
Madison County	D	+11.6%	2,024	1,602	3,647
Minidoka County	D	+0.4%	1,668	1,654	3,432
Nez Perce County	D	+27.7%	5,747	3,168	9,322
Oneida County	D	+2.3%	1,008	962	1,982
Owyhee County	R	−2.3%	925	969	1,937
Payette County	R	−21.1%	1,568	2,430	4,081
Power County	R	−4.8%	795	875	1,681
Shoshone County	D	+15.4%	4,472	3,200	8,261
Teton County	D	+6.2%	672	593	1,272
Twin Falls County	R	−12.9%	6,019	7,833	14,061
Valley County	R	−6.0%	828	939	1,841
Washington County	R	−0.4%	1,700	1,713	3,481