2024 results by precinct
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Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,874 | 4,044 | 6,013 | |
| 2020 | R | 2,061 | 4,010 | 6,185 | |
| 2016 | R | 1,922 | 3,525 | 5,885 | |
| 2012 | D | 3,043 | 2,813 | 5,957 | |
| 2008 | D | 3,000 | 2,781 | 5,909 | |
| 2004 | R | 2,747 | 3,165 | 5,978 | |
| 2000 | R | 2,540 | 3,003 | 5,740 | |
| 1996 | D | 2,787 | 2,156 | 5,657 | |
| 1992 | D | 2,565 | 2,224 | 6,102 | |
| 1988 | D | 3,236 | 2,751 | 6,041 | |
| 1984 | R | 2,875 | 3,583 | 6,576 | |
| 1980 | R | 2,182 | 3,372 | 5,979 | |
| 1976 | D | 2,955 | 2,873 | 5,948 | |
| 1972 | R | 2,112 | 3,734 | 5,977 | |
| 1968 | R | 2,137 | 3,365 | 5,898 | |
| 1964 | D | 3,751 | 2,502 | 6,263 | |
| 1960 | R | 2,720 | 4,417 | 7,142 | |
| 1956 | R | 2,828 | 4,666 | 7,501 | |
| 1952 | R | 2,566 | 5,742 | 8,332 | |
| 1948 | R | 3,218 | 4,138 | 7,414 | |
| 1944 | R | 2,861 | 4,566 | 7,450 | |
| 1940 | R | 3,229 | 5,421 | 8,668 | |
| 1936 | R | 3,938 | 4,647 | 8,699 | |
| 1932 | D | 3,967 | 3,043 | 7,083 | |
| 1928 | R | 2,651 | 5,432 | 8,143 | |
| 1924 | R | 1,166 | 4,250 | 7,848 | |
| 1920 | R | 2,228 | 4,466 | 6,805 | |
| 1916 | R | 1,985 | 2,050 | 4,104 | |
| 1912 | D | 1,528 | 1,096 | 3,893 | |
| 1908 | R | 1,843 | 2,207 | 4,215 | |
| 1904 | R | 1,322 | 2,674 | 4,302 | |
| 1900 | R | 2,218 | 2,462 | 4,841 | |
| 1896 | D | 2,425 | 2,196 | 4,689 | |
| 1892 | R | 1,508 | 1,914 | 4,089 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
American
100.0%
Italian
0.6%
African American
1.3%
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. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 40.5 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.
Median household income
2024 inflation-adjusted dollars
$57,772
Union County ranks near the middle of US counties.
Union County$57,772
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
12.4%
Children face moderate poverty.
Children under 1818.0%
Working age (18–64)100.0%
Seniors (65+)18.0%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
0.0%
speak English only
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 65.1% of residents not counted as adherents by any reporting body.
Union County's population has hovered near 12,000 for decades, and its predominantly rural, non-college workforce profile mirrors the demographic shift that has pushed its presidential margins steadily rightward since 2008.
The Republican margin in Union County reached its widest at thirty-nine points in 1924. The margin in 2024 was thirty-six points, in line with the county's deep historical pattern.
Union County's loyalty is rooted in its place. Median household income of $57,772, a 93% non-Hispanic-white share, and a population of 11,993 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Delaware County and Appanoose County.
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