Akashic
1892–2024
Akashic
Ottumwa, IA
presidential margin
2008D+13.52012D+11.92016R+20.42020R+23.62024R+31.4
full record · 1892 → 2024
R+31.4
2024
median income$64,766U.S. $80,734 · IA $75,059
median age39.2U.S. 39.1 · IA 38.8
poverty rate15.8%U.S. 12.5% · IA 11.1%
bachelor’s+ (25+)19.6%U.S. 35.6% · IA 31.8%
non-english15.1%U.S. 22.3% · IA 9.2%
race · ethnicity · ancestry
German17.6%
English12.5%
Irish9.9%
Mexican7.4%
Guatemalan2.3%
Salvadoran1.8%
African1.2%
African American†1.0%
Ethiopian0.5%
Chuukese2.0%
Maya0.4%
Marshallese0.4%
Filipino1.0%
Laotian0.5%
Chinese0.2%
religion
other traditions
Mainline3.7%
Latter-day Saints0.9%
Other Christian0.8%
Black Protestant0.8%
American Community Survey 2024 5-year (income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents, unaffiliated is the unclaimed remainder.

Ottumwa, IA, Iowa

Akashic
Ottumwa, IATrumpR+31.4
—
2024 presidential margin by county for Ottumwa, IA, IAA map of the single county of Ottumwa, IA, IA, outlined and filled by its 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), seated within the faint outlines of the surrounding states.Wapello County, IA · R+31.4
How it voted
Share of the 2024 vote
Donald Trump ✓Republican65.0%9,479
Kamala HarrisDemocratic33.6%4,896
Robert F. Kennedy Jr.We The People1.4%208
D+60
R+60
A single county, filled by its 2024 D-vs-R margin. Hover it for the full result.
County-level results (1 county) — table
2024 presidential result by county for Ottumwa, IA, IA — winner and D-vs-R margin.
CountyWinnerMargin
Wapello County, IARepublicanR+31.4
34 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonDemocraticRepublicanOtherMarginTotal
R
33.6%Harris4,896
65.0%Trump9,479
1.4%Kennedy208
−31.4%
14,583
R
37.2%Biden5,821
60.9%Trump9,516
1.9%Jorgensen296
−23.6%
15,633
R
36.6%Clinton5,594
57.0%Trump8,715
6.3%Johnson968
−20.4%
15,277
D
54.9%Obama8,663
43.1%Romney6,789
2.0%Johnson318
+11.9%
15,770
D
55.4%Obama8,820
41.8%McCain6,663
2.8%Nader448
+13.5%
15,931
D
54.6%Kerry9,125
44.3%Bush7,403
1.1%Other179
+10.3%
16,707
D
55.2%Gore8,355
41.7%Bush6,313
3.1%Nader471
+13.5%
15,139
D
57.1%Clinton8,437
32.7%Dole4,828
10.2%Perot1,505
+24.4%
14,770
D
53.9%Clinton8,670
30.2%Bush4,852
15.9%Perot2,561
+23.7%
16,083
D
64.9%Dukakis10,177
34.1%Bush5,350
0.9%Larouche146
+30.8%
15,673
D
59.2%Mondale10,545
39.9%Reagan7,098
0.9%Larouche157
+19.4%
17,800
D
50.5%Carter8,923
42.3%Reagan7,475
7.2%Anderson1,270
+8.2%
17,668
D
59.4%Carter10,249
39.3%Ford6,786
1.3%McCarthy233
+20.1%
17,268
R
45.9%McGovern8,348
51.2%Nixon9,301
2.9%Schmitz522
−5.2%
18,171
D
50.3%Humphrey9,375
42.0%Nixon7,825
7.8%Wallace1,447
+8.3%
18,647
D
71.5%Johnson13,971
28.3%Goldwater5,524
0.3%Hass51
+43.2%
19,546
D
50.1%Kennedy11,116
49.8%Nixon11,036
0.1%Byrd15
+0.4%
22,167
D
51.3%Stevenson10,960
48.6%Eisenhower10,401
0.1%Andrews20
+2.6%
21,381
R
47.2%Stevenson10,449
52.2%Eisenhower11,571
0.6%Hallinan130
−5.1%
22,150
D
57.1%Truman10,841
41.5%Dewey7,875
1.4%Thurmond260
+15.6%
18,976
D
56.2%Roosevelt10,732
43.2%Dewey8,244
0.6%Thomas113
+13.0%
19,089
D
56.6%Roosevelt11,880
43.0%Willkie9,039
0.4%Thomas87
+13.5%
21,006
D
57.1%Roosevelt10,578
41.3%Landon7,647
1.6%Lemke287
+15.8%
18,512
D
55.7%Roosevelt9,504
42.5%Hoover7,256
1.9%Thomas316
+13.2%
17,076
R
33.0%Smith5,793
66.1%Hoover11,586
0.9%Thomas149
−33.0%
17,528
R
17.5%Davis3,039
57.0%Coolidge9,870
25.5%La Follette4,420
−39.4%
17,329
R
28.4%Cox4,131
68.0%Harding9,884
3.6%Debs522
−39.6%
14,537
R
43.3%Wilson3,994
47.7%Hughes4,398
9.1%Benson837
−4.4%
9,229
D
36.6%Wilson3,102
32.5%Taft2,755
30.9%Roosevelt2,613
+4.1%
8,470
R
41.6%Bryan3,724
50.7%Taft4,541
7.7%Debs694
−9.1%
8,959
R
30.5%Parker2,473
60.6%Roosevelt4,912
8.9%Debs720
−30.1%
8,105
R
43.8%Bryan3,902
53.2%McKinley4,742
3.0%Woolley268
−9.4%
8,912
R
47.5%Bryan4,041
50.8%McKinley4,319
1.8%Palmer150
−3.3%
8,510
R
43.3%Cleveland3,380
46.7%Harrison3,643
10.0%Weaver781
−3.4%
7,804
presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
Presidential margin over timeDemocratic-minus-Republican presidential margin from 1892 to 2024. Most recent: −31.4% in 2024.flipped R · 2016−31.4%DR18922024
Presidential margin over time
YearMargin (D minus R)
1892−3.4%
1896−3.3%
1900−9.4%
1904−30.1%
1908−9.1%
1912+4.1%
1916−4.4%
1920−39.6%
1924−39.4%
1928−33.0%
1932+13.2%
1936+15.8%
1940+13.5%
1944+13.0%
1948+15.6%
1952−5.1%
1956+2.6%
1960+0.4%
1964+43.2%
1968+8.3%
1972−5.2%
1976+20.1%
1980+8.2%
1984+19.4%
1988+30.8%
1992+23.7%
1996+24.4%
2000+13.5%
2004+10.3%
2008+13.5%
2012+11.9%
2016−20.4%
2020−23.6%
2024−31.4%
DemocraticRepublican
voter registration
Registered voters
By party of registration, over time
Voter registration in Ottumwa, IARegistered voters by party of registration, 2008–2024. Latest total 21,487 in 2024.6K12K18K23.9K21.5K20082024
DemocraticRepublicanUnaffiliatedOther parties
Voter registration in Ottumwa, IA
YearTotal registeredDemocraticRepublicanUnaffiliatedOther
200823,69511,4214,8887,3815
201023,69710,8025,6037,2839
201223,94010,2975,7157,90622
201423,1079,6875,4617,91643
201622,8549,2335,8067,72590
201822,1128,6325,6547,714112
202022,2868,2016,5507,383152
202221,6687,2576,8917,349171
202421,4876,5187,1587,629182
Source: Iowa Secretary of State

Ottumwa anchors Wapello County along the Des Moines River, where a large Latino workforce tied to the IBP/Tyson plant has gradually reshaped a historically union-Democrat electorate that has swung sharply toward Republicans in recent presidential cycles.

Across the recorded series it reached a Democratic high of 43.2 points in 1964 and a Republican high of 39.6 points in 1920. Between 2020 and 2024 the metro moved 7.8 points toward the Republican candidate; the 2024 margin was 31.4 points.

A population of 35,362, a 76% non-Hispanic-white share, and a median household income of $64,766 describe the metro. The metro's voting pattern over the last decade is most similar to that of Burlington, IA-IL and Fort Madison, IA.

Political twins — metros

The metros whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.

Burlington, IA-IL
89.3twin score
12-yr trend2000–2012 trajectory≠ Scottish ancestry
Fort Madison, IA
88.7twin score
12-yr trend2000–2012 trajectory≠ Irish ancestry
Muscatine, IA
85.7twin score
12-yr trend2004–2012 trajectory

Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.

Compare two places, side by side

Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →

Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Ottumwa, IA, Iowa. Akashic. https://akashic.app/cbsa/36900/. Accessed May 20, 2026. License: CC BY 4.0.
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Places within Ottumwa, IA

counties1
Wapello County

Frequently asked questions

How did Ottumwa, IA, Iowa vote in 2024?
In 2024, Ottumwa, IA, Iowa voted Republican by 31.4 points (R+31.4), carried by the Republican candidate. Out of 14,583 votes cast, 4,896 went Democratic and 9,479 went Republican.
When did Ottumwa, IA, Iowa last vote Democratic?
The most recent presidential election in which Ottumwa, IA, Iowa voted Democratic was 2012.
How many people live in Ottumwa, IA, Iowa?
Ottumwa, IA, Iowa has a population of 35,362 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Ottumwa, IA, Iowa?
Median household income in Ottumwa, IA, Iowa is $64,766 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Ottumwa, IA, Iowa?
Akashic tracks 34 presidential elections in Ottumwa, IA, Iowa from 1892 to 2024. Of those, 20 went Democratic and 14 went Republican.