County record · fips 19149 · Iowa
PlymouthIA
Republican ×15 since 1968all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+54.9
won by Republicans
Record since first cycle
8–32
Dem–Rep two-party wins
Voted with the winner
27/40
68% of its elections
Closest election
1928
D+1.7
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 |
|---|---|---|
| 1940 | -52.1 pts | Republicans |
| 1912 | +51.8 pts | Democrats |
| 1916 | -50.6 pts | Republicans |
| 1920 | -46.1 pts | Republicans |
| 1932 | +43.0 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
25,747
College (BA+)
22%
Median income
$83,251
2024 dollars
Non-white
12%
Rural
61%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.