County record · fips 19057 · Iowa
Des MoinesIA
Republican ×3 since 2016all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+15.3
won by Republicans
Record since first cycle
19–21
Dem–Rep two-party wins
Voted with the winner
28/40
70% of its elections
Closest election
1936
D+1.8
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 |
|---|---|---|
| 1932 | +56.2 pts | Democrats |
| 1964 | +44.8 pts | Democrats |
| 1920 | -37.4 pts | Republicans |
| 1968 | -31.7 pts | Republicans |
| 1940 | -26.9 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
38,487
College (BA+)
24%
Median income
$62,928
2024 dollars
Non-white
16%
Rural
27%
Age 65+
21%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Henderson, IL · Mercer, IL · Henry, IA · Lee, IA · Louisa, IA