County record · fips 20087 · Kansas
JeffersonKS
Republican ×23 since 1936all 40 elections, 1868–2024
The Long Record
40 elections against the Kansas and national vote
2024 result
R+37.7
won by Republicans
Record since first cycle
2–38
Dem–Rep two-party wins
Voted with the winner
25/40
63% of its elections
Closest election
1992
R+0.6
this countyKansasnational (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 |
|---|---|---|
| 1896 | +99.0 pts | Democrats |
| 1892 | -82.9 pts | Republicans |
| 1932 | +53.5 pts | Democrats |
| 1976 | +36.4 pts | Democrats |
| 1920 | -34.4 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
18,349
College (BA+)
25%
Median income
$81,278
2024 dollars
Non-white
9%
Rural
99%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Atchison, KS · Douglas, KS · Jackson, KS · Leavenworth, KS · Shawnee, KS