Theodore Roosevelt carried Iowa R+32.7.

Alton B. Parker (D) vs Theodore Roosevelt (R) in Iowa, 1904. The state ran 13.0 points more Republican than the nation (R+19.7 nationally).

Nominees: Alton B. Parker (D) · Theodore Roosevelt (R)

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Iowa result

486,093 votes counted

Parker (D)

149,276

30.7%

Roosevelt (R)

308,158

63.4%

All others

28,659

5.9%

Margin

R+32.7

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1904 presidential election

Iowa, 1904

RooseveltR+32.7

How it voted

Share of the 1904 vote

Theodore Roosevelt ✓Republican	63.4%	308,158
Alton B. ParkerDemocratic	30.7%	149,276
OtherAll other candidates	5.9%	28,659

D+60

R+60

99 counties, each filled by 1904 D-vs-R margin. Hover any county for its result.

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Iowa's presidential margins

1892–2024, the 1904 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 — 1904

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

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County	Won	Margin	Democratic	Republican	Total
Adair County	R	−41.7%	895	2,303	3,376
Adams County	R	−25.4%	1,003	1,761	2,989
Allamakee County	R	−24.6%	1,571	2,609	4,224
Appanoose County	R	−30.9%	1,743	3,607	6,026
Audubon County	R	−32.1%	934	1,843	2,836
Benton County	R	−26.3%	2,057	3,609	5,907
Black Hawk County	R	−43.1%	1,861	5,236	7,827
Boone County	R	−46.0%	1,148	3,830	5,833
Bremer County	R	−3.8%	1,783	1,927	3,792
Buchanan County	R	−27.3%	1,545	2,798	4,592
Buena Vista County	R	−57.6%	605	2,483	3,260
Butler County	R	−52.7%	815	2,743	3,658
Calhoun County	R	−43.8%	870	2,479	3,676
Carroll County	R	−5.6%	2,040	2,290	4,471
Cass County	R	−35.6%	1,394	3,050	4,653
Cedar County	R	−16.2%	1,926	2,691	4,726
Cerro Gordo County	R	−54.5%	836	3,108	4,169
Cherokee County	R	−53.6%	688	2,446	3,279
Chickasaw County	R	−4.8%	1,790	1,972	3,811
Clarke County	R	−32.4%	896	1,799	2,786
Clay County	R	−60.9%	487	2,154	2,737
Clayton County	R	−11.6%	2,628	3,339	6,117
Clinton County	R	−12.0%	4,074	5,265	9,891
Crawford County	R	−11.2%	2,004	2,530	4,678
Dallas County	R	−46.8%	1,159	3,499	4,999
Davis County	R	−5.6%	1,533	1,722	3,382
Decatur County	R	−21.2%	1,548	2,430	4,158
Delaware County	R	−36.6%	1,236	2,726	4,066
Des Moines County	R	−17.5%	3,043	4,496	8,299
Dickinson County	R	−59.6%	312	1,320	1,692
Dubuque County	R	−5.0%	4,913	5,485	11,353
Emmet County	R	−63.6%	358	1,732	2,161
Fayette County	R	−29.9%	2,070	3,978	6,376
Floyd County	R	−55.7%	761	2,820	3,697
Franklin County	R	−61.6%	531	2,346	2,946
Fremont County	R	−18.3%	1,511	2,227	3,911
Greene County	R	−45.6%	908	2,583	3,676
Grundy County	R	−35.7%	938	2,021	3,037
Guthrie County	R	−45.1%	1,032	2,857	4,050
Hamilton County	R	−58.6%	746	3,118	4,045
Hancock County	R	−59.2%	517	2,112	2,694
Hardin County	R	−62.7%	749	3,643	4,615
Harrison County	R	−30.8%	1,696	3,364	5,421
Henry County	R	−33.8%	1,259	2,647	4,106
Howard County	R	−23.9%	1,096	1,823	3,042
Humboldt County	R	−66.3%	369	1,950	2,385
Ida County	R	−24.2%	940	1,565	2,580
Iowa County	R	−9.4%	1,891	2,303	4,361
Jackson County	R	−7.5%	2,483	2,899	5,540
Jasper County	R	−31.8%	1,942	3,962	6,350
Jefferson County	R	−30.9%	1,172	2,330	3,744
Johnson County	D	+2.0%	3,085	2,963	6,139
Jones County	R	−20.9%	1,834	2,833	4,788
Keokuk County	R	−16.4%	2,172	3,079	5,516
Kossuth County	R	−37.4%	1,352	3,001	4,412
Lee County	R	−8.7%	3,848	4,612	8,749
Linn County	R	−36.4%	3,600	8,131	12,440
Louisa County	R	−50.2%	663	2,147	2,957
Lucas County	R	−40.2%	878	2,259	3,437
Lyon County	R	−34.7%	841	1,802	2,770
Madison County	R	−34.3%	1,190	2,602	4,117
Mahaska County	R	−26.3%	2,287	4,091	6,867
Marion County	R	−14.0%	2,202	2,988	5,632
Marshall County	R	−47.8%	1,203	4,229	6,337
Mills County	R	−26.5%	1,274	2,252	3,688
Mitchell County	R	−52.9%	634	2,158	2,880
Monona County	R	−35.9%	1,016	2,274	3,509
Monroe County	R	−39.6%	1,182	3,249	5,226
Montgomery County	R	−56.9%	722	2,956	3,928
Muscatine County	R	−20.9%	2,555	4,036	7,076
O'Brien County	R	−42.2%	885	2,279	3,306
Osceola County	R	−35.7%	554	1,179	1,750
Page County	R	−51.8%	944	3,463	4,863
Palo Alto County	R	−29.1%	1,081	1,999	3,157
Plymouth County	R	−26.3%	1,663	2,905	4,726
Pocahontas County	R	−36.4%	976	2,175	3,291
Polk County	R	−56.7%	3,086	14,113	19,458
Pottawattamie County	R	−27.9%	3,731	6,868	11,233
Poweshiek County	R	−41.4%	1,212	3,137	4,649
Ringgold County	R	−43.0%	835	2,200	3,171
Sac County	R	−49.3%	835	2,609	3,602
Scott County	R	−14.2%	4,931	6,789	13,066
Shelby County	R	−18.1%	1,584	2,310	4,004
Sioux County	R	−43.6%	1,151	2,992	4,224
Story County	R	−63.6%	752	3,919	4,977
Tama County	R	−13.5%	2,360	3,127	5,673
Taylor County	R	−39.5%	1,060	2,650	4,021
Union County	R	−31.4%	1,322	2,674	4,302
Van Buren County	R	−26.2%	1,416	2,469	4,014
Wapello County	R	−30.1%	2,473	4,912	8,105
Warren County	R	−39.4%	1,191	2,938	4,438
Washington County	R	−22.7%	1,772	2,875	4,853
Wayne County	R	−20.5%	1,452	2,290	4,081
Webster County	R	−40.6%	1,714	4,358	6,517
Winnebago County	R	−81.7%	174	2,002	2,238
Winneshiek County	R	−39.1%	1,467	3,383	4,906
Woodbury County	R	−42.1%	2,809	7,597	11,364
Worth County	R	−66.8%	307	1,659	2,024
Wright County	R	−58.1%	695	2,795	3,612