County record · fips 17119 · Illinois
MadisonIL
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
R+13.5
won by Republicans
Record since first cycle
21–19
Dem–Rep two-party wins
Voted with the winner
30/40
75% of its elections
Closest election
2012
R+1.4
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 |
|---|---|---|
| 1876 | +101.5 pts | Democrats |
| 1872 | -92.7 pts | Republicans |
| 1932 | +36.5 pts | Democrats |
| 1968 | -29.0 pts | Republicans |
| 1920 | -27.1 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
264,238
College (BA+)
31%
Median income
$75,793
2024 dollars
Non-white
18%
Rural
16%
Age 65+
19%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Bond, IL · Clinton, IL · Jersey, IL · Macoupin, IL · Montgomery, IL · St. Clair, IL · St. Charles, MO · St. Louis County, MO · St. Louis City, MO