County record · fips 19043 · Iowa
ClaytonIA
Republican ×3 since 2016all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+34.9
won by Republicans
Record since first cycle
15–25
Dem–Rep two-party wins
Voted with the winner
28/40
70% of its elections
Closest election
1876
R+0.8
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 | -57.3 pts | Republicans |
| 1932 | +55.8 pts | Democrats |
| 1968 | -41.5 pts | Republicans |
| 1920 | -40.8 pts | Republicans |
| 1912 | +36.0 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
17,013
College (BA+)
14%
Median income
$67,242
2024 dollars
Non-white
5%
Rural
99%
Age 65+
25%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Allamakee, IA · Delaware, IA · Dubuque, IA · Fayette, IA · Crawford, WI · Grant, WI