County record · fips 16031 · Idaho
CassiaID
Republican ×21 since 1944reported 1892–2024 · 34 elections
The Long Record
34 elections against the Idaho and national vote
2024 result
R+70.8
won by Republicans
Record since first cycle
5–29
Dem–Rep two-party wins
Voted with the winner
21/34
62% of its elections
Closest election
1940
D+3.2
this countyIdahonational (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 | +163.6 pts | Democrats |
| 1900 | -67.4 pts | Republicans |
| 1932 | +53.6 pts | Democrats |
| 1920 | -49.6 pts | Republicans |
| 1904 | -48.4 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
25,483
College (BA+)
21%
Median income
$70,830
2024 dollars
Non-white
36%
Rural
50%
Age 65+
14%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Blaine, ID · Jerome, ID · Minidoka, ID · Oneida, ID · Power, ID · Twin Falls, ID · Elko, NV · Box Elder, UT