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 | 6,473 | 14,055 | 20,902 | |
| 2020 | R | 6,569 | 14,142 | 21,206 | |
| 2016 | R | 5,535 | 12,629 | 19,354 | |
| 2012 | R | 6,215 | 10,888 | 17,494 | |
| 2008 | R | 7,953 | 9,881 | 18,083 | |
| 2004 | R | 6,788 | 9,468 | 16,370 | |
| 2000 | R | 5,797 | 7,632 | 13,796 | |
| 1996 | R | 4,798 | 5,350 | 11,535 | |
| 1992 | D | 4,894 | 4,807 | 12,542 | |
| 1988 | R | 4,529 | 6,275 | 10,851 | |
| 1984 | R | 3,256 | 6,936 | 10,217 | |
| 1980 | R | 3,121 | 6,315 | 9,924 | |
| 1976 | R | 3,984 | 5,602 | 9,716 | |
| 1972 | R | 2,958 | 6,479 | 9,466 | |
| 1968 | R | 2,822 | 5,086 | 9,167 | |
| 1964 | D | 4,605 | 3,936 | 8,541 | |
| 1960 | R | 3,398 | 4,731 | 8,133 | |
| 1956 | R | 2,648 | 4,715 | 7,364 | |
| 1952 | R | 2,430 | 4,528 | 6,959 | |
| 1948 | R | 2,026 | 3,403 | 5,432 | |
| 1944 | R | 2,068 | 4,032 | 6,109 | |
| 1940 | R | 2,826 | 4,754 | 7,602 | |
| 1936 | D | 3,477 | 3,226 | 6,850 | |
| 1932 | D | 3,993 | 2,186 | 6,259 | |
| 1928 | D | 2,934 | 2,721 | 5,665 | |
| 1924 | R | 1,369 | 2,390 | 4,943 | |
| 1920 | R | 932 | 2,955 | 4,215 | |
| 1916 | R | 2,104 | 2,825 | 4,964 | |
| 1912 | R | 1,398 | 1,433 | 3,155 | |
| 1908 | R | 1,512 | 1,733 | 3,273 | |
| 1904 | R | 1,440 | 1,622 | 3,100 | |
| 1900 | D | 1,757 | 1,535 | 3,308 | |
| 1896 | D | 1,652 | 1,446 | 3,131 | |
| 1892 | D | 1,611 | 1,153 | 2,879 | |
| 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: 43.2 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
$102,880
Monroe County ranks in the top 5% of US counties.
Monroe County$102,880
Illinois$83,390
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
5.0%
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 42.7% of residents not counted as adherents by any reporting body.
Tucked along the Mississippi south of St. Louis, Monroe County has shifted steadily rightward over two decades, delivering a 36-point Republican presidential margin in 2024 despite sitting within commuting distance of a major metro area.
The Republican margin in Monroe County reached its widest at forty-eight points in 1920. The margin in 2024 was thirty-six points, in line with the county's deep historical pattern.
Monroe County's loyalty is rooted in its place. Median household income of $102,880, a 96% non-Hispanic-white share, and a population of 35,036 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 Washington County and Warren County.
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