County record · fips 19167 · Iowa
SiouxIA
Republican ×22 since 1940all 40 elections, 1868–2024
The Long Record
40 elections against the Iowa and national vote
2024 result
R+71.9
won by Republicans
Record since first cycle
3–37
Dem–Rep two-party wins
Voted with the winner
26/40
65% of its elections
Closest election
1916
R+4.9
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 |
|---|---|---|
| 1912 | +60.9 pts | Democrats |
| 1932 | +60.4 pts | Democrats |
| 1920 | -55.2 pts | Republicans |
| 1952 | -50.6 pts | Republicans |
| 1916 | -48.2 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
36,212
College (BA+)
31%
Median income
$86,098
2024 dollars
Non-white
17%
Rural
57%
Age 65+
16%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Lyon, IA · O'Brien, IA · Plymouth, IA · Lincoln, SD · Union, SD