Jasper County, Iowa: Heartland Swing county. In 2024, voted R+28%. Republican peak: R+46 in 1924.
Key facts
- 2024 presidential margin
- R+28MIT Election Lab
- Political typology
- Heartland SwingAkashic typology
- Population
- 37,9542024 5-year
- Median household income
- $71,3112024 5-year
- White (non-Hispanic)
- 91.7%2024 5-year
- Black
- 1.5%2024 5-year
- Hispanic / Latino
- 3.1%2024 5-year
- Peak Democratic margin
- D+31 in 1964MIT Election Lab
- Peak Republican margin
- R+46 in 1924MIT Election Lab
- Most similar
- Webster County, IA · similarity 0.99
2024 results by precinct
2024 precinct map of Jasper CountyPrecinct-level 2024 presidential results for Jasper 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 | −9.8% |
| 1896 | +4.3% |
| 1900 | −10.2% |
| 1904 | −31.8% |
| 1908 | −9.8% |
| 1912 | +11.4% |
| 1916 | +2.9% |
| 1920 | −36.5% |
| 1924 | −46.3% |
| 1928 | −40.3% |
| 1932 | +11.1% |
| 1936 | +17.0% |
| 1940 | +5.8% |
| 1944 | +4.2% |
| 1948 | +7.6% |
| 1952 | −17.3% |
| 1956 | −13.5% |
| 1960 | −12.6% |
| 1964 | +31.5% |
| 1968 | −8.8% |
| 1972 | −12.9% |
| 1976 | +6.3% |
| 1980 | −6.1% |
| 1984 | −3.3% |
| 1988 | +14.2% |
| 1992 | +7.0% |
| 1996 | +14.2% |
| 2000 | −0.2% |
| 2004 | +4.8% |
| 2008 | +7.5% |
| 2012 | +7.1% |
| 2016 | −17.9% |
| 2020 | −21.5% |
| 2024 | −27.5% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 7,141 | 12,701 | 20,198 | ||
| R | 7,737 | 12,084 | 20,184 | ||
| R | 7,109 | 10,560 | 19,226 | ||
| D | 10,257 | 8,877 | 19,515 | ||
| D | 10,250 | 8,794 | 19,421 | ||
| D | 10,430 | 9,462 | 20,062 | ||
| R | 8,699 | 8,729 | 17,835 | ||
| D | 8,776 | 6,414 | 16,585 | ||
| D | 8,120 | 6,866 | 18,012 | ||
| D | 8,940 | 6,703 | 15,733 | ||
| R | 8,023 | 8,576 | 16,699 | ||
| R | 7,258 | 8,286 | 16,966 | ||
| D | 8,783 | 7,728 | 16,786 | ||
| R | 7,007 | 9,133 | 16,513 | ||
| R | 6,556 | 7,901 | 15,255 | ||
| D | 10,216 | 5,321 | 15,561 | ||
| R | 7,242 | 9,332 | 16,585 | ||
| R | 7,098 | 9,310 | 16,428 | ||
| R | 6,756 | 9,610 | 16,465 | ||
| D | 6,684 | 5,710 | 12,786 | ||
| D | 6,978 | 6,413 | 13,479 | ||
| D | 8,129 | 7,240 | 15,421 | ||
| D | 8,315 | 5,875 | 14,395 | ||
| D | 6,781 | 5,399 | 12,401 | ||
| R | 3,857 | 9,144 | 13,108 | ||
| R | 1,214 | 6,565 | 11,557 | ||
| R | 3,390 | 7,417 | 11,029 | ||
| D | 3,282 | 3,092 | 6,568 | ||
| D | 2,487 | 1,766 | 6,345 | ||
| R | 2,889 | 3,543 | 6,681 | ||
| R | 1,942 | 3,962 | 6,350 | ||
| R | 3,163 | 3,894 | 7,193 | ||
| D | 3,019 | 2,768 | 5,863 | ||
| R | 2,556 | 3,167 | 6,217 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
25.9%
English
12.0%
Irish
11.9%
American
6.8%
Italian
2.3%
Scottish
2.0%
French
1.3%
African American
1.2%
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
$71,311
Jasper County ranks near the middle of US counties.
Jasper County$71,311
Iowa$75,059
United States$80,734
Jasper County ranks near the middle 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
8.3%
Child poverty is below the national average.
Children under 1810.8%
Working age (18–64)7.7%
Seniors (65+)6.8%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
94.9%
speak English only
Spanish2.6%
Other languages1.3%
Asian & Pacific Islander0.8%
Other Indo-European0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 66.9% of residents not counted as adherents by any reporting body.
Jasper County, once a nationally watched presidential bellwether, has moved decisively rightward over the past decade. Its mix of rural farmland and the small manufacturing city of Newton now produces Republican margins exceeding 27 points.
The Democratic margin here peaked at thirty-one points in 1964. Between 2020 and 2024 the county moved six points toward the Republican candidate; the 2024 margin was twenty-eight points.
A population of 37,954, a 92% non-Hispanic-white share, and a median household income of $71,311 describe the county. The county's voting pattern over the last decade is most similar to that of Webster County and Tama 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.
Jasper County, Iowa. Akashic. https://akashic.app/county/19099/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More heartland swing counties
Frequently asked questions
How did Jasper County, Iowa vote in 2024?
In 2024, Jasper County, Iowa voted Republican by 27.5 points (R+28), carried by the Republican candidate. Out of 20,198 votes cast, 7,141 went Democratic and 12,701 went Republican.
What is Jasper County, Iowa's political typology?
Akashic places Jasper County, Iowa in the "Heartland Swing" typology — Industrial Midwest swing counties drifting steadily toward the Republican Party. 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 16 times, Republican 18 times, and other 0 times.
When did Jasper County, Iowa last vote Democratic?
The most recent presidential election in which Jasper County, Iowa voted Democratic was 2012.
How many people live in Jasper County, Iowa?
Jasper County, Iowa has a population of 37,954 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jasper County, Iowa?
Median household income in Jasper County, Iowa is $71,311 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Jasper County, Iowa?
Akashic tracks 38 presidential elections in Jasper County, Iowa from 1876 to 2024. Of those, 16 went Democratic and 18 went Republican. The county's typology — "Heartland Swing" — captures where that record, its demographics, and its recent swing place it among American communities.