2024 results by precinct
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| 2024 | R | 1,811 | 4,600 | 6,505 | |
| 2020 | R | 1,959 | 4,697 | 6,795 | |
| 2016 | R | 1,662 | 4,362 | 6,448 | |
| 2012 | R | 2,469 | 3,911 | 6,483 | |
| 2008 | R | 2,863 | 3,488 | 6,453 | |
| 2004 | R | 2,355 | 4,256 | 6,670 | |
| 2000 | R | 2,179 | 3,655 | 6,009 | |
| 1996 | R | 2,176 | 3,056 | 5,941 | |
| 1992 | R | 2,094 | 2,809 | 6,544 | |
| 1988 | R | 2,806 | 3,019 | 5,860 | |
| 1984 | R | 2,291 | 4,200 | 6,537 | |
| 1980 | R | 1,892 | 4,147 | 6,477 | |
| 1976 | R | 2,851 | 3,301 | 6,261 | |
| 1972 | R | 2,259 | 4,052 | 6,439 | |
| 1968 | R | 2,365 | 3,886 | 6,626 | |
| 1964 | D | 4,148 | 2,928 | 7,137 | |
| 1960 | R | 3,427 | 4,210 | 7,644 | |
| 1956 | R | 3,300 | 4,425 | 7,793 | |
| 1952 | R | 2,762 | 5,135 | 7,939 | |
| 1948 | D | 3,499 | 3,301 | 6,935 | |
| 1944 | R | 2,978 | 3,873 | 6,933 | |
| 1940 | R | 3,811 | 4,613 | 8,460 | |
| 1936 | D | 4,264 | 3,490 | 8,231 | |
| 1932 | D | 4,940 | 2,478 | 7,540 | |
| 1928 | D | 3,604 | 3,459 | 7,081 | |
| 1924 | R | 2,297 | 3,252 | 6,780 | |
| 1920 | R | 1,882 | 4,621 | 6,550 | |
| 1916 | D | 2,060 | 1,898 | 3,996 | |
| 1912 | D | 1,841 | 872 | 3,853 | |
| 1908 | R | 1,935 | 1,973 | 3,999 | |
| 1904 | R | 1,584 | 2,310 | 4,004 | |
| 1900 | R | 2,010 | 2,182 | 4,239 | |
| 1896 | D | 2,175 | 2,019 | 4,219 | |
| 1892 | D | 1,890 | 1,674 | 3,769 | |
| 1888 | — | — | — | — | |
| 1884 | — | — | — | — | |
| 1880 | — | — | — | — | |
| 1876 | — | — | — | — |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
American
100.0%
Sample size too small to break out by ancestry reliably.
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: 44.3 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.
Median household income
2024 inflation-adjusted dollars
$72,738
Shelby County ranks near the middle of US counties.
Shelby County$72,738
Iowa$75,059
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
7.6%
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 38.1% of residents not counted as adherents by any reporting body.
Shelby County's 2024 presidential margin of R+42.9 reflects a broader rural Iowa realignment; its small, agriculture-rooted population has shifted decisively toward Republican candidates across multiple election cycles.
The Republican margin in Shelby County reached its widest at forty-three points in 2024. The margin in 2024 was forty-three points, in line with the county's deep historical pattern.
Shelby County's loyalty is rooted in its place. Median household income of $72,738, a 92% non-Hispanic-white share, and a population of 11,778 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 Johnson County and Greeley County.
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