County record · fips 19099 · Iowa
JasperIA
Republican ×3 since 2016★ Bellwetherall 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+28.0
won by Republicans
Record since first cycle
15–25
Dem–Rep two-party wins
Voted with the winner
34/40
85% of its elections · ★ bellwether
Closest election
2000
R+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 |
|---|---|---|
| 1932 | +52.0 pts | Democrats |
| 1964 | +44.1 pts | Democrats |
| 1968 | -40.8 pts | Republicans |
| 1920 | -40.2 pts | Republicans |
| 1884 | +33.8 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
37,954
College (BA+)
20%
Median income
$71,311
2024 dollars
Non-white
9%
Rural
58%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Mahaska, IA · Marion, IA · Marshall, IA · Polk, IA · Poweshiek, IA · Story, IA