Franklin D. Roosevelt carried Idaho D+9.1.

Franklin D. Roosevelt (D) vs Wendell Willkie (R) in Idaho, 1940. The state ran 0.9 points more Republican than the nation (D+9.9 nationally).

Nominees: Franklin D. Roosevelt (D) · Wendell Willkie (R)

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Idaho result

235,168 votes counted

Roosevelt (D)

127,842

54.4%

Willkie (R)

106,553

45.3%

All others

773

0.3%

Margin

D+9.1

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1940 presidential election

Idaho, 1940

RooseveltD+9.1

How it voted

Share of the 1940 vote

Franklin D. Roosevelt ✓Democratic	54.4%	127,842
Wendell WillkieRepublican	45.3%	106,553
OtherAll other candidates	0.3%	773

D+60

R+60

44 counties, each filled by 1940 D-vs-R margin. Hover any county for its result.

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Idaho's presidential margins

1892–2024, the 1940 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 — 1940

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

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County	Won	Margin	Democratic	Republican	Total
Ada County	R	−1.9%	12,381	12,861	25,293
Adams County	D	+8.8%	929	779	1,711
Bannock County	D	+31.9%	10,493	5,419	15,913
Bear Lake County	D	+7.0%	2,026	1,761	3,787
Benewah County	D	+19.1%	1,924	1,304	3,250
Bingham County	D	+2.0%	3,815	3,662	7,488
Blaine County	D	+16.2%	1,559	1,124	2,687
Boise County	D	+16.1%	677	489	1,167
Bonner County	D	+11.0%	3,834	3,072	6,940
Bonneville County	D	+19.1%	5,891	3,999	9,900
Boundary County	D	+6.4%	1,393	1,221	2,684
Butte County	D	+2.9%	448	423	871
Camas County	D	+1.9%	381	367	748
Canyon County	R	−0.8%	8,639	8,776	17,478
Caribou County	D	+25.5%	658	390	1,049
Cassia County	D	+3.2%	2,930	2,748	5,689
Clark County	R	−30.6%	212	399	611
Clearwater County	D	+33.7%	2,284	1,128	3,429
Custer County	D	+8.1%	894	760	1,659
Elmore County	D	+20.5%	1,632	1,077	2,713
Franklin County	D	+2.1%	2,158	2,069	4,227
Fremont County	D	+12.3%	2,556	1,996	4,554
Gem County	D	+29.1%	2,666	1,462	4,132
Gooding County	R	−10.1%	1,919	2,352	4,275
Idaho County	D	+4.5%	2,888	2,641	5,545
Jefferson County	D	+20.9%	2,631	1,717	4,364
Jerome County	R	−14.5%	1,881	2,520	4,408
Kootenai County	D	+15.9%	5,997	4,333	10,462
Latah County	D	+6.2%	4,494	3,971	8,500
Lemhi County	D	+8.2%	1,664	1,412	3,077
Lewis County	D	+33.3%	1,462	729	2,198
Lincoln County	R	−6.5%	886	1,009	1,902
Madison County	D	+15.2%	2,218	1,632	3,851
Minidoka County	D	+0.1%	1,982	1,979	3,974
Nez Perce County	D	+27.1%	5,963	3,409	9,413
Oneida County	D	+11.6%	1,440	1,140	2,584
Owyhee County	D	+5.9%	1,160	1,031	2,205
Payette County	R	−17.5%	1,790	2,554	4,364
Power County	R	−1.1%	931	951	1,885
Shoshone County	D	+29.9%	6,565	3,525	10,172
Teton County	D	+11.7%	844	667	1,511
Twin Falls County	R	−10.7%	7,286	9,031	16,351
Valley County	D	+20.8%	1,165	761	1,943
Washington County	D	+9.3%	2,296	1,903	4,204