County record · fips 19019 · Iowa
BuchananIA
Republican ×3 since 2016all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+28.6
won by Republicans
Record since first cycle
11–29
Dem–Rep two-party wins
Voted with the winner
28/40
70% of its elections
Closest election
1948
R+2.2
this countyIowanational (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 |
|---|---|---|
| 1916 | -43.8 pts | Republicans |
| 1968 | -38.2 pts | Republicans |
| 1964 | +37.5 pts | Democrats |
| 1932 | +37.4 pts | Democrats |
| 1912 | +33.9 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
20,694
College (BA+)
22%
Median income
$78,236
2024 dollars
Non-white
5%
Rural
67%
Age 65+
19%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Benton, IA · Black Hawk, IA · Delaware, IA · Fayette, IA · Linn, IA