County record · fips 30043 · Montana
JeffersonMT
Republican ×14 since 1972reported 1892–2024 · 34 elections
The Long Record
34 elections against the Montana and national vote
2024 result
R+37.6
won by Republicans
Record since first cycle
12–22
Dem–Rep two-party wins
Voted with the winner
22/34
65% of its elections
Closest election
1944
D+0.4
this countyMontananational (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 |
|---|---|---|
| 1896 | +87.6 pts | Democrats |
| 1900 | -53.4 pts | Republicans |
| 1904 | -40.2 pts | Republicans |
| 1920 | -39.4 pts | Republicans |
| 1932 | +37.6 pts | Democrats |
Who Lives Here
Census & ACS county profile, 2024
Population
12,774
College (BA+)
32%
Median income
$95,490
2024 dollars
Non-white
9%
Rural
100%
Age 65+
23%
Interpolated between Census/ACS anchors; income CPI-deflated to 2024. Demographics begin in 2000 — earlier cycles have returns only.
Neighbouring counties
Broadwater, MT · Deer Lodge, MT · Gallatin, MT · Lewis and Clark, MT · Madison, MT · Powell, MT · Silver Bow, MT