County record · fips 17133 · Illinois
MonroeIL
Republican ×8 since 1996all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
R+36.9
won by Republicans
Record since first cycle
14–26
Dem–Rep two-party wins
Voted with the winner
21/40
53% of its elections
Closest election
1992
D+0.9
this countyIllinoisnational (official)dot colour = two-party winner · hollow = tie or unknown total · click a dot to open that election
The Biggest Swings
Cycle-over-cycle change in the two-party margin, in points
| Election | Swing | Toward |
|---|---|---|
| 1920 | -37.4 pts | Republicans |
| 1968 | -36.5 pts | Republicans |
| 1928 | +30.9 pts | Democrats |
| 1940 | -29.2 pts | Republicans |
| 1932 | +25.5 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
35,036
College (BA+)
39%
Median income
$102,880
2024 dollars
Non-white
5%
Rural
42%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Randolph, IL · St. Clair, IL · Jefferson, MO · Ste. Genevieve, MO · St. Louis County, MO