County record · fips 17125 · Illinois
MasonIL
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
R+43.1
won by Republicans
Record since first cycle
19–21
Dem–Rep two-party wins
Voted with the winner
26/40
65% of its elections
Closest election
1904
D+0.2
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 | +110.1 pts | Democrats |
| 1872 | -100.7 pts | Republicans |
| 1932 | +47.9 pts | Democrats |
| 1968 | -33.7 pts | Republicans |
| 1964 | +32.6 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
12,745
College (BA+)
17%
Median income
$62,845
2024 dollars
Non-white
6%
Rural
100%
Age 65+
23%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Cass, IL · Fulton, IL · Logan, IL · Menard, IL · Schuyler, IL · Tazewell, IL