Ronald Reagan carried Idaho R+46.0.

Walter Mondale (D) vs Ronald Reagan (R) in Idaho, 1984. The state ran 27.8 points more Republican than the nation (R+18.2 nationally). A US Senate contest shared the 1984 ballot here.

Nominees: Walter Mondale (D) · Ronald Reagan (R)

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Idaho result

411,144 votes counted

Mondale (D)

108,510

26.4%

Reagan (R)

297,523

72.4%

All others

5,111

1.2%

Margin

R+46.0

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1984 presidential election

Idaho, 1984

ReaganR+46.0

How it voted

Share of the 1984 vote

Ronald Reagan ✓Republican	72.4%	297,523
Walter MondaleDemocratic	26.4%	108,510
OtherAll other candidates	1.2%	5,111

D+60

R+60

44 counties, each filled by 1984 D-vs-R margin. Hover any county for its result.

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Idaho's presidential margins

1892–2024, the 1984 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 — 1984

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

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County	Won	Margin	Democratic	Republican	Total
Ada County	R	−46.2%	21,760	60,036	82,924
Adams County	R	−43.0%	540	1,381	1,956
Bannock County	R	−32.8%	9,399	18,742	28,496
Bear Lake County	R	−69.8%	481	2,760	3,267
Benewah County	R	−16.8%	1,447	2,039	3,534
Bingham County	R	−58.5%	3,064	11,900	15,116
Blaine County	R	−28.8%	1,971	3,603	5,657
Boise County	R	−47.2%	436	1,249	1,721
Bonner County	R	−19.3%	4,628	6,889	11,699
Bonneville County	R	−66.2%	4,877	24,392	29,490
Boundary County	R	−29.4%	1,158	2,159	3,402
Butte County	R	−48.4%	429	1,245	1,685
Camas County	R	−49.1%	123	364	491
Canyon County	R	−52.4%	7,527	24,613	32,587
Caribou County	R	−69.4%	535	3,032	3,597
Cassia County	R	−72.0%	1,036	6,503	7,597
Clark County	R	−70.8%	59	353	415
Clearwater County	R	−14.8%	1,608	2,176	3,848
Custer County	R	−55.6%	461	1,653	2,144
Elmore County	R	−51.4%	1,458	4,595	6,105
Franklin County	R	−75.4%	439	3,261	3,742
Fremont County	R	−65.7%	818	4,006	4,853
Gem County	R	−38.1%	1,607	3,644	5,350
Gooding County	R	−50.2%	1,247	3,819	5,119
Idaho County	R	−35.0%	1,996	4,219	6,349
Jefferson County	R	−76.6%	743	5,770	6,563
Jerome County	R	−58.0%	1,284	4,913	6,259
Kootenai County	R	−31.2%	9,004	17,330	26,689
Latah County	R	−15.8%	5,571	7,709	13,500
Lemhi County	R	−52.8%	852	2,810	3,708
Lewis County	R	−21.1%	648	1,000	1,666
Lincoln County	R	−51.1%	386	1,211	1,615
Madison County	R	−86.3%	483	6,798	7,319
Minidoka County	R	−61.2%	1,398	5,938	7,420
Nez Perce County	R	−15.2%	5,981	8,153	14,330
Oneida County	R	−61.5%	360	1,528	1,898
Owyhee County	R	−56.9%	574	2,141	2,755
Payette County	R	−52.2%	1,410	4,605	6,121
Power County	R	−53.9%	678	2,298	3,004
Shoshone County	R	−2.0%	3,033	3,156	6,284
Teton County	R	−53.7%	370	1,242	1,624
Twin Falls County	R	−57.0%	4,567	16,974	21,771
Valley County	R	−41.2%	945	2,299	3,286
Washington County	R	−45.3%	1,119	3,015	4,188