County record · fips 19075 · Iowa
GrundyIA
Republican ×15 since 1968all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+42.5
won by Republicans
Record since first cycle
4–36
Dem–Rep two-party wins
Voted with the winner
27/40
68% of its elections
Closest election
1892
R+0.7
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 | -81.8 pts | Republicans |
| 1912 | +71.8 pts | Democrats |
| 1932 | +59.2 pts | Democrats |
| 1968 | -54.2 pts | Republicans |
| 1964 | +44.7 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
12,384
College (BA+)
28%
Median income
$87,205
2024 dollars
Non-white
5%
Rural
100%
Age 65+
21%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Black Hawk, IA · Butler, IA · Hardin, IA · Marshall, IA · Tama, IA