Ronald Reagan carried Iowa R+12.7.

Jimmy Carter (D) vs Ronald Reagan (R) in Iowa, 1980. The state ran 3.0 points more Republican than the nation (R+9.7 nationally). A US Senate contest shared the 1980 ballot here.

Nominees: Jimmy Carter (D) · Ronald Reagan (R)

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Iowa result

1,317,661 votes counted

Carter (D)

508,672

38.6%

Reagan (R)

676,026

51.3%

All others

132,963

10.1%

Margin

R+12.7

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1980 presidential election

Iowa, 1980

ReaganR+12.7

How it voted

Share of the 1980 vote

Ronald Reagan ✓Republican	51.3%	676,026
Jimmy CarterDemocratic	38.6%	508,672
John B. AndersonIndependent	10.1%	132,963

D+60

R+60

99 counties, each filled by 1980 D-vs-R margin. Hover any county for its result.

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Iowa's presidential margins

1892–2024, the 1980 contest in context

Iowa's presidential margins

Year	Margin (D minus R)
1892	−5.3%
1896	−12.6%
1900	−18.6%
1904	−32.7%
1908	−15.0%
1912	+13.3%
1916	−11.4%
1920	−45.5%
1924	−38.6%
1928	−24.2%
1932	+17.7%
1936	+11.7%
1940	−4.4%
1944	−4.5%
1948	+2.7%
1952	−28.2%
1956	−18.4%
1960	−13.5%
1964	+24.0%
1968	−12.2%
1972	−17.1%
1976	−1.0%
1980	−12.7%
1984	−7.4%
1988	+10.2%
1992	+6.0%
1996	+10.3%
2000	+0.3%
2004	−0.7%
2008	+9.5%
2012	+5.8%
2016	−9.3%
2020	−8.2%
2024	−13.2%

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County results — 1980

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

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County	Won	Margin	Democratic	Republican	Total
Adair County	R	−29.2%	1,454	2,821	4,689
Adams County	R	−28.1%	940	1,779	2,984
Allamakee County	R	−27.8%	2,170	4,000	6,586
Appanoose County	R	−11.5%	2,769	3,544	6,728
Audubon County	R	−22.4%	1,546	2,523	4,353
Benton County	R	−10.4%	4,223	5,329	10,635
Black Hawk County	R	−3.4%	27,443	29,627	63,722
Boone County	R	−5.0%	5,126	5,732	12,087
Bremer County	R	−28.1%	3,527	6,706	11,318
Buchanan County	R	−15.2%	3,605	5,041	9,422
Buena Vista County	R	−18.6%	3,468	5,272	9,676
Butler County	R	−38.2%	1,990	4,730	7,177
Calhoun County	R	−23.4%	2,150	3,633	6,328
Carroll County	R	−11.6%	3,885	5,017	9,737
Cass County	R	−39.6%	2,176	5,391	8,126
Cedar County	R	−23.2%	2,589	4,398	7,797
Cerro Gordo County	R	−8.0%	9,363	11,189	22,828
Cherokee County	R	−18.2%	2,719	4,087	7,500
Chickasaw County	R	−13.4%	2,935	3,929	7,433
Clarke County	R	−18.2%	1,614	2,417	4,404
Clay County	R	−14.8%	3,179	4,479	8,764
Clayton County	R	−19.7%	3,297	5,115	9,206
Clinton County	R	−13.2%	9,698	13,025	25,211
Crawford County	R	−29.8%	2,500	4,883	8,002
Dallas County	R	−7.6%	5,310	6,296	12,964
Davis County	R	−8.0%	1,689	2,003	3,930
Decatur County	R	−3.5%	2,048	2,212	4,640
Delaware County	R	−21.1%	2,671	4,316	7,794
Des Moines County	D	+4.0%	9,977	9,158	20,417
Dickinson County	R	−18.9%	2,620	4,028	7,442
Dubuque County	D	+0.1%	18,689	18,649	41,539
Emmet County	R	−15.9%	2,153	3,062	5,724
Fayette County	R	−17.3%	4,377	6,374	11,523
Floyd County	R	−11.3%	3,634	4,665	9,118
Franklin County	R	−24.1%	1,920	3,290	5,682
Fremont County	R	−36.1%	1,203	2,693	4,131
Greene County	R	−15.9%	2,210	3,154	5,939
Grundy County	R	−39.5%	1,869	4,644	7,026
Guthrie County	R	−24.4%	1,866	3,214	5,514
Hamilton County	R	−24.2%	2,741	4,745	8,266
Hancock County	R	−28.9%	1,918	3,681	6,092
Hardin County	R	−15.8%	3,757	5,329	9,920
Harrison County	R	−33.3%	2,152	4,502	7,053
Henry County	R	−13.2%	3,317	4,430	8,462
Howard County	R	−13.6%	2,214	2,975	5,576
Humboldt County	R	−29.4%	1,840	3,575	5,899
Ida County	R	−36.5%	1,235	2,825	4,354
Iowa County	R	−20.6%	2,606	4,153	7,522
Jackson County	R	−11.0%	3,518	4,479	8,754
Jasper County	R	−6.1%	7,258	8,286	16,966
Jefferson County	R	−20.9%	2,577	4,099	7,299
Johnson County	D	+15.1%	20,122	13,642	42,997
Jones County	R	−11.1%	3,521	4,506	8,913
Keokuk County	R	−12.6%	2,390	3,145	5,975
Kossuth County	R	−17.1%	3,810	5,568	10,262
Lee County	R	−3.2%	8,204	8,793	18,265
Linn County	R	−5.5%	31,950	36,254	78,224
Louisa County	R	−18.1%	1,700	2,530	4,584
Lucas County	R	−12.3%	1,989	2,593	4,929
Lyon County	R	−47.0%	1,431	4,349	6,208
Madison County	R	−12.9%	2,496	3,320	6,411
Mahaska County	R	−16.2%	3,968	5,650	10,363
Marion County	R	−8.7%	5,490	6,665	13,518
Marshall County	R	−18.3%	7,114	10,707	19,626
Mills County	R	−45.1%	1,244	3,581	5,183
Mitchell County	R	−23.2%	2,040	3,401	5,864
Monona County	R	−30.4%	1,660	3,268	5,284
Monroe County	R	−3.3%	1,866	2,003	4,117
Montgomery County	R	−42.3%	1,556	4,115	6,054
Muscatine County	R	−14.7%	5,597	7,829	15,145
O'Brien County	R	−35.1%	2,210	4,937	7,761
Osceola County	R	−32.3%	1,051	2,177	3,486
Page County	R	−49.2%	1,772	5,618	7,810
Palo Alto County	R	−9.4%	2,463	3,025	5,968
Plymouth County	R	−34.3%	2,965	6,515	10,346
Pocahontas County	R	−21.7%	1,959	3,194	5,686
Polk County	R	−1.5%	61,984	64,156	143,758
Pottawattamie County	R	−28.7%	10,709	20,222	33,170
Poweshiek County	R	−11.7%	3,529	4,598	9,102
Ringgold County	R	−22.6%	1,150	1,884	3,251
Sac County	R	−27.9%	1,976	3,725	6,264
Scott County	R	−12.2%	26,391	34,701	67,926
Shelby County	R	−34.8%	1,892	4,147	6,477
Sioux County	R	−57.0%	2,698	10,768	14,167
Story County	R	−6.2%	13,529	15,829	37,371
Tama County	R	−20.8%	3,049	4,840	8,602
Taylor County	R	−35.3%	1,226	2,715	4,213
Union County	R	−19.9%	2,182	3,372	5,979
Van Buren County	R	−22.6%	1,311	2,142	3,680
Wapello County	D	+8.2%	8,923	7,475	17,668
Warren County	R	−4.8%	6,610	7,360	15,519
Washington County	R	−14.3%	2,877	3,967	7,627
Wayne County	R	−14.5%	1,627	2,221	4,104
Webster County	R	−6.8%	9,001	10,438	21,030
Winnebago County	R	−24.7%	2,208	3,808	6,479
Winneshiek County	R	−19.7%	3,201	5,033	9,304
Woodbury County	R	−17.6%	15,930	23,553	43,275
Worth County	R	−12.2%	1,721	2,247	4,310
Wright County	R	−18.1%	2,645	3,936	7,147