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 | 2,816 | 8,684 | 11,694 | |
| 2020 | R | 2,961 | 8,712 | 11,960 | |
| 2016 | R | 2,679 | 7,748 | 10,991 | |
| 2012 | R | 3,667 | 6,039 | 10,001 | |
| 2008 | R | 5,042 | 5,329 | 10,583 | |
| 2004 | R | 4,597 | 5,435 | 10,137 | |
| 2000 | R | 4,355 | 4,699 | 9,413 | |
| 1996 | D | 4,275 | 3,211 | 8,766 | |
| 1992 | D | 4,749 | 2,933 | 10,093 | |
| 1988 | D | 4,376 | 4,343 | 8,752 | |
| 1984 | R | 3,762 | 5,146 | 8,934 | |
| 1980 | R | 3,324 | 5,266 | 8,985 | |
| 1976 | D | 4,625 | 4,273 | 8,983 | |
| 1972 | R | 3,317 | 5,164 | 8,507 | |
| 1968 | R | 3,350 | 3,806 | 8,130 | |
| 1964 | D | 3,936 | 3,041 | 6,977 | |
| 1960 | R | 4,087 | 4,247 | 8,343 | |
| 1956 | R | 3,415 | 4,220 | 7,640 | |
| 1952 | R | 3,424 | 4,031 | 7,461 | |
| 1948 | D | 3,092 | 3,021 | 6,139 | |
| 1944 | R | 2,910 | 3,546 | 6,486 | |
| 1940 | R | 3,692 | 3,958 | 7,694 | |
| 1936 | D | 3,955 | 3,023 | 7,061 | |
| 1932 | D | 3,807 | 2,157 | 6,069 | |
| 1928 | R | 2,473 | 2,993 | 5,480 | |
| 1924 | D | 2,723 | 2,460 | 5,536 | |
| 1920 | R | 1,999 | 2,873 | 4,962 | |
| 1916 | D | 3,052 | 2,644 | 5,828 | |
| 1912 | D | 1,573 | 838 | 2,857 | |
| 1908 | D | 1,818 | 1,460 | 3,382 | |
| 1904 | D | 1,713 | 1,531 | 3,380 | |
| 1900 | D | 2,145 | 1,496 | 3,733 | |
| 1896 | D | 2,377 | 1,641 | 4,080 | |
| 1892 | D | 2,011 | 1,314 | 3,516 | |
| 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: 43.7 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
$80,361
Jersey County ranks in the top 25% of US counties.
Jersey County$80,361
Illinois$83,390
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
8.8%
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 61.2% of residents not counted as adherents by any reporting body.
Jersey County, a rural Mississippi River county southwest of St. Louis, has shifted steadily rightward over two decades — its 2024 presidential margin of R+50 places it among the most lopsided counties in a state that trends Democratic statewide.
The Republican margin in Jersey County reached its widest at fifty points in 2024. The margin in 2024 was fifty points, in line with the county's deep historical pattern.
Jersey County's loyalty is rooted in its place. Median household income of $80,361, a 95% non-Hispanic-white share, and a population of 21,274 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 Marion County and St. Francois County.
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