County record · fips 17037 · Illinois
DeKalbIL
Democratic ×5 since 2008all 40 elections, 1868–2024
The Long Record
40 elections against the Illinois and national vote
2024 result
D+2.0
won by Democrats
Record since first cycle
7–33
Dem–Rep two-party wins
Voted with the winner
26/40
65% of its elections
Closest election
1996
D+1.3
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 | +52.0 pts | Democrats |
| 1912 | +48.2 pts | Democrats |
| 1916 | -42.3 pts | Republicans |
| 1872 | -37.7 pts | Republicans |
| 1932 | +34.0 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
100,703
College (BA+)
33%
Median income
$70,724
2024 dollars
Non-white
29%
Rural
22%
Age 65+
14%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Boone, IL · Kane, IL · Kendall, IL · LaSalle, IL · Lee, IL · McHenry, IL · Ogle, IL