County record · fips 55055 · Wisconsin
JeffersonWI
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Wisconsin and national vote
2024 result
R+16.6
won by Republicans
Record since first cycle
16–24
Dem–Rep two-party wins
Voted with the winner
23/40
57% of its elections
Closest election
2008
D+0.8
this countyWisconsinnational (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 |
|---|---|---|
| 1920 | -64.0 pts | Republicans |
| 1932 | +53.3 pts | Democrats |
| 1940 | -46.1 pts | Republicans |
| 1964 | +44.1 pts | Democrats |
| 1916 | -40.8 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
86,003
College (BA+)
29%
Median income
$83,750
2024 dollars
Non-white
13%
Rural
45%
Age 65+
19%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Dane, WI · Dodge, WI · Rock, WI · Walworth, WI · Waukesha, WI