County record · fips 17099 · Illinois
LaSalleIL
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
R+18.7
won by Republicans
Record since first cycle
13–27
Dem–Rep two-party wins
Voted with the winner
30/40
75% of its elections
Closest election
1960
D+0.0
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 | +95.4 pts | Democrats |
| 1872 | -90.9 pts | Republicans |
| 1928 | +47.8 pts | Democrats |
| 1920 | -39.3 pts | Republicans |
| 1912 | +37.4 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
108,714
College (BA+)
20%
Median income
$73,045
2024 dollars
Non-white
18%
Rural
32%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Bureau, IL · DeKalb, IL · Grundy, IL · Kendall, IL · Lee, IL · Livingston, IL · Marshall, IL · Putnam, IL · Woodford, IL