County record · fips 46103 · South Dakota
PenningtonSD
Republican ×15 since 1968reported 1892–2024 · 34 elections
The Long Record
34 elections against the South Dakota and national vote
2024 result
R+27.2
won by Republicans
Record since first cycle
6–28
Dem–Rep two-party wins
Voted with the winner
22/34
65% of its elections
Closest election
1964
D+5.1
this countySouth Dakotanational (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 | +118.9 pts | Democrats |
| 1896 | +92.5 pts | Democrats |
| 1916 | -90.6 pts | Republicans |
| 1932 | +51.9 pts | Democrats |
| 1920 | -45.1 pts | Republicans |
Who Lives Here
Census & ACS county profile, 2024
Population
113,512
College (BA+)
35%
Median income
$74,517
2024 dollars
Non-white
22%
Rural
18%
Age 65+
20%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Custer, SD · Haakon, SD · Jackson, SD · Lawrence, SD · Meade, SD · Oglala Lakota, SD · Weston, WY