County record · fips 19055 · Iowa
DelawareIA
Republican ×4 since 2012all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+40.2
won by Republicans
Record since first cycle
6–34
Dem–Rep two-party wins
Voted with the winner
27/40
68% of its elections
Closest election
1912
D+0.2
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 |
|---|---|---|
| 1968 | -40.4 pts | Republicans |
| 1916 | -36.1 pts | Republicans |
| 1928 | +34.5 pts | Democrats |
| 1932 | +33.3 pts | Democrats |
| 1940 | -33.3 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
17,558
College (BA+)
23%
Median income
$74,989
2024 dollars
Non-white
6%
Rural
72%
Age 65+
22%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Buchanan, IA · Clayton, IA · Dubuque, IA · Jones, IA · Linn, IA