Jefferson County, Montana

2024 results by precinct

12 precincts · 8,291 votes cast

Trump · R+37

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	R	−36.5%	2,516	5,544	8,291
2020	R	−33.4%	2,625	5,345	8,151
2016	R	−32.5%	1,998	4,177	6,714
2012	R	−27.3%	2,272	4,055	6,521
2008	R	−15.1%	2,582	3,538	6,340
2004	R	−33.5%	1,881	3,844	5,868
2000	R	−34.8%	1,513	3,308	5,163
1996	R	−9.9%	1,775	2,248	4,801
1992	R	−3.0%	1,415	1,541	4,225
1988	R	−6.8%	1,746	2,007	3,837
1984	R	−24.9%	1,324	2,226	3,618
1980	R	−24.4%	1,055	1,841	3,223
1976	R	−6.7%	1,210	1,387	2,654
1972	R	−16.5%	904	1,281	2,285
1968	D	+1.2%	820	798	1,771
1964	D	+18.7%	967	662	1,631
1960	R	−3.0%	769	817	1,590
1956	R	−22.8%	660	1,049	1,709
1952	R	−22.3%	687	1,084	1,784
1948	D	+5.2%	836	750	1,644
1944	D	+0.4%	803	797	1,603
1940	D	+20.5%	1,259	830	2,097
1936	D	+40.5%	1,409	573	2,063
1932	D	+21.9%	1,246	784	2,114
1928	R	−14.7%	751	1,013	1,778
1924	R	−12.0%	434	648	1,776
1920	R	−15.8%	688	969	1,779
1916	D	+21.2%	1,124	712	1,944
1912	D	+20.1%	479	239	1,193
1908	D	+12.1%	714	546	1,392
1904	R	−5.7%	580	663	1,456
1900	D	+32.8%	980	488	1,498
1896	D	+86.9%	2,185	153	2,339
1892	R	−0.5%	730	740	1,945
1888	—	No data	—	—	—
1884	—	No data	—	—	—
1880	—	No data	—	—	—
1876	—	No data	—	—	—

Demographics

Race, ethnicity, and ancestry

Click any group to see the ancestries typically reported within it.

American

100.0%

Irish

0.5%

Sample size too small to break out by ancestry reliably.

Multiple ancestry combinations reported; no single grouping above 1%.

Sample size too small to break out by ancestry reliably.

American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.

Source · American Community Survey 5-year estimates, 2024 release. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.

Age distribution by sex

Median age: 47.1 in this county, 39.1 nationally

Male

Age

Female

0.3%

85+

0.3%

3.5%

75–84

3.4%

7.9%

65–74

7.8%

7.9%

55–64

8.4%

6.5%

45–54

6.2%

35–44

5.9%

4.7%

25–34

4.8%

3.1%

18–24

3.1%

7.9%

5–17

7.7%

2.5%

1.9%

Source · American Community Survey 5-year estimates, 2024 release.

Median household income

2024 inflation-adjusted dollars

$95,490

Jefferson County ranks in the top 5% of US counties.

Jefferson County$95,490

Montana$72,509

United States$80,734

Source · American Community Survey 5-year estimates, 2024 release.

Poverty rate

All persons below federal poverty line

5.7%

Children face moderate poverty.

Children under 1818.0%

Working age (18–64)100.0%

Seniors (65+)18.0%

Source · American Community Survey 5-year estimates, 2024 release.

Language at home

Population aged 5 and older

0.0%

speak English only

Source · ACS 5-year estimates, 2024.

Religious adherents

Adherents per capita by tradition

Other Christian

13.5%

Catholic & Orthodox

6.7%

Pentecostal & Holiness

2.9%

Methodist

2.3%

Baptist

1.4%

Mainline Protestant

0.9%

Source · 2020 US Religion Census. Remaining 72.3% of residents not counted as adherents by any reporting body.

Jefferson County's population of roughly 10,000 is spread across former gold and silver mining corridors west of Helena. It has delivered double-digit Republican presidential margins in every cycle this century, with 2024's spread exceeding 36 points.

The Republican margin in Jefferson County reached its widest at thirty-seven points in 2024. The margin in 2024 was thirty-seven points, in line with the county's deep historical pattern.

Jefferson County's loyalty is rooted in its place. Median household income of $95,490, a 92% non-Hispanic-white share, and a population of 12,774 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Carbon County and Powell County.

Most similar counties

Jefferson County has voted Republican for as long as anyone can remember.