County record · fips 19079 · Iowa
HamiltonIA
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+33.7
won by Republicans
Record since first cycle
12–28
Dem–Rep two-party wins
Voted with the winner
33/40
83% of its elections
Closest election
1976
D+0.3
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 |
|---|---|---|
| 1928 | +63.2 pts | Democrats |
| 1916 | -57.2 pts | Republicans |
| 1932 | +54.8 pts | Democrats |
| 1912 | +52.7 pts | Democrats |
| 1968 | -45.0 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
14,886
College (BA+)
23%
Median income
$72,432
2024 dollars
Non-white
16%
Rural
49%
Age 65+
21%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Boone, IA · Hardin, IA · Story, IA · Webster, IA · Wright, IA