Plymouth County, Iowa: Farm Belt county. In 2024, voted R+54%. Republican peak: R+54 in 2024.
Key facts
- 2024 presidential margin
- R+54MIT Election Lab
- Political typology
- Farm BeltAkashic typology
- Population
- 25,7472024 5-year
- Median household income
- $83,2512024 5-year
- White (non-Hispanic)
- 89.4%2024 5-year
- Black
- 2.4%2024 5-year
- Hispanic / Latino
- 6.4%2024 5-year
- Peak Democratic margin
- D+44 in 1932MIT Election Lab
- Peak Republican margin
- R+54 in 1920MIT Election Lab
- Most similar
- Osceola County, IA · similarity 1.00
2024 results by precinct
2024 precinct map of Plymouth CountyPrecinct-level 2024 presidential results for Plymouth County, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | +13.7% |
| 1896 | −4.5% |
| 1900 | −7.9% |
| 1904 | −26.3% |
| 1908 | −9.2% |
| 1912 | +24.5% |
| 1916 | −8.1% |
| 1920 | −53.6% |
| 1924 | −24.3% |
| 1928 | +1.7% |
| 1932 | +44.3% |
| 1936 | +16.3% |
| 1940 | −33.6% |
| 1944 | −34.3% |
| 1948 | −7.0% |
| 1952 | −49.0% |
| 1956 | −34.8% |
| 1960 | −15.9% |
| 1964 | +7.3% |
| 1968 | −29.9% |
| 1972 | −22.0% |
| 1976 | −13.0% |
| 1980 | −34.3% |
| 1984 | −30.1% |
| 1988 | −11.4% |
| 1992 | −19.3% |
| 1996 | −13.8% |
| 2000 | −26.6% |
| 2004 | −28.9% |
| 2008 | −25.1% |
| 2012 | −34.2% |
| 2016 | −51.2% |
| 2020 | −49.3% |
| 2024 | −54.1% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 3,104 | 10,661 | 13,971 | ||
| R | 3,494 | 10,492 | 14,188 | ||
| R | 2,885 | 9,680 | 13,274 | ||
| R | 4,164 | 8,597 | 12,950 | ||
| R | 4,629 | 7,765 | 12,512 | ||
| R | 4,278 | 7,810 | 12,222 | ||
| R | 3,499 | 6,189 | 10,118 | ||
| R | 3,745 | 5,117 | 9,956 | ||
| R | 3,171 | 5,196 | 10,484 | ||
| R | 4,220 | 5,316 | 9,607 | ||
| R | 3,464 | 6,482 | 10,027 | ||
| R | 2,965 | 6,515 | 10,346 | ||
| R | 4,284 | 5,590 | 10,016 | ||
| R | 4,033 | 6,339 | 10,466 | ||
| R | 3,234 | 6,236 | 10,037 | ||
| D | 5,691 | 4,920 | 10,613 | ||
| R | 4,671 | 6,432 | 11,103 | ||
| R | 3,502 | 7,246 | 10,748 | ||
| R | 2,768 | 8,140 | 10,957 | ||
| R | 4,339 | 5,002 | 9,416 | ||
| R | 2,970 | 6,085 | 9,076 | ||
| R | 3,831 | 7,725 | 11,579 | ||
| D | 5,994 | 4,133 | 11,445 | ||
| D | 7,565 | 2,888 | 10,563 | ||
| D | 5,015 | 4,848 | 9,897 | ||
| R | 1,605 | 3,803 | 9,036 | ||
| R | 1,801 | 6,090 | 7,996 | ||
| R | 2,258 | 2,666 | 5,017 | ||
| O | 2,038 | 825 | 4,942 | ||
| R | 2,168 | 2,622 | 4,930 | ||
| R | 1,663 | 2,905 | 4,726 | ||
| R | 2,307 | 2,712 | 5,114 | ||
| R | 2,392 | 2,623 | 5,103 | ||
| D | 2,244 | 1,672 | 4,169 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
39.0%
Irish
12.1%
American
6.7%
English
6.3%
French
1.7%
Polish
1.0%
Italian
0.9%
African American
1.9%
Multiple ancestry combinations reported; no single grouping above 1%.
Sample size too small to break out by ancestry reliably.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 41.3 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$83,251
Plymouth County ranks in the top 25% of US counties.
Plymouth County$83,251
Iowa$75,059
United States$80,734
Plymouth County ranks in the top 25% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
6.9%
Child poverty is below the national average.
Children under 188.8%
Working age (18–64)5.3%
Seniors (65+)15.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
93.1%
speak English only
Spanish4.3%
Other languages1.5%
Asian & Pacific Islander0.7%
Other Indo-European0.5%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 38.9% of residents not counted as adherents by any reporting body.
Plymouth County in northwest Iowa delivered a 54-point Republican presidential margin in 2024, reflecting the heavily rural, agricultural character of a region where small-town and farm households dominate the electorate.
The Republican margin here reached fifty-four points in 2024. Between 2020 and 2024 the county moved five points toward the Republican candidate; the 2024 margin was fifty-four points.
A population of 25,747, a 89% non-Hispanic-white share, and a median household income of $83,251 describe an agricultural county. The county's voting pattern over the last decade is most similar to that of Osceola County and McKenzie County.
Most similar counties
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.
Plymouth County, Iowa. Akashic. https://akashic.app/county/19149/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More farm belt counties
Frequently asked questions
How did Plymouth County, Iowa vote in 2024?
In 2024, Plymouth County, Iowa voted Republican by 54.1 points (R+54), carried by the Republican candidate. Out of 13,971 votes cast, 3,104 went Democratic and 10,661 went Republican.
What is Plymouth County, Iowa's political typology?
Akashic places Plymouth County, Iowa in the "Farm Belt" typology — Rural Plains and Midwest farm counties — Republican, with modest recent movement. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 5 times, Republican 28 times, and other 1 times.
When did Plymouth County, Iowa last vote Democratic?
The most recent presidential election in which Plymouth County, Iowa voted Democratic was 1964.
How many people live in Plymouth County, Iowa?
Plymouth County, Iowa has a population of 25,747 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Plymouth County, Iowa?
Median household income in Plymouth County, Iowa is $83,251 — above the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Plymouth County, Iowa?
Akashic tracks 38 presidential elections in Plymouth County, Iowa from 1876 to 2024. Of those, 5 went Democratic and 28 went Republican. The county's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.