County record · fips 17017 · Illinois
CassIL
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
R+44.2
won by Republicans
Record since first cycle
23–17
Dem–Rep two-party wins
Voted with the winner
28/40
70% of its elections
Closest election
1976
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 |
|---|---|---|
| 1876 | +102.8 pts | Democrats |
| 1872 | -101.5 pts | Republicans |
| 1932 | +42.1 pts | Democrats |
| 1912 | +38.2 pts | Democrats |
| 1916 | -34.3 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
12,784
College (BA+)
21%
Median income
$68,125
2024 dollars
Non-white
30%
Rural
52%
Age 65+
18%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Brown, IL · Mason, IL · Menard, IL · Morgan, IL · Sangamon, IL · Schuyler, IL