County record · fips 16001 · Idaho
AdaID
Republican ×22 since 1940reported 1892–2024 · 34 elections
The Long Record
34 elections against the Idaho and national vote
2024 result
R+10.6
won by Republicans
Record since first cycle
3–31
Dem–Rep two-party wins
Voted with the winner
19/34
56% of its elections
Closest election
1916
R+0.9
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 | +128.2 pts | Democrats |
| 1932 | +49.4 pts | Democrats |
| 1900 | -41.4 pts | Republicans |
| 1908 | +38.7 pts | Democrats |
| 1904 | -37.9 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
518,935
College (BA+)
45%
Median income
$91,502
2024 dollars
Non-white
19%
Rural
6%
Age 65+
16%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Boise, ID · Canyon, ID · Elmore, ID · Gem, ID · Owyhee, ID