Lewis and Clark County, Montana

2024 results by precinct

32 precincts · 42,023 votes cast

Trump · R+6

Harris +50

Trump +50

Real precinct boundaries. Hover for vote totals.

38 presidential elections

Year	Won	Margin	Democratic	Republican	Total
2024	R	−5.7%	19,085	21,479	42,023
2020	R	−3.9%	19,743	21,409	42,265
2016	R	−6.8%	14,478	16,895	35,296
2012	R	−3.6%	15,620	16,803	33,318
2008	D	+6.5%	17,114	14,966	32,873
2004	R	−12.7%	12,717	16,494	29,843
2000	R	−18.7%	9,982	15,091	27,269
1996	R	−0.5%	11,535	11,665	26,547
1992	D	+6.7%	11,117	9,351	26,179
1988	D	+4.2%	11,932	10,946	23,334
1984	R	−21.2%	8,768	13,569	22,626
1980	R	−25.0%	6,815	12,128	21,212
1976	R	−11.0%	8,118	10,155	18,517
1972	R	−26.8%	6,081	10,719	17,316
1968	R	−18.4%	5,379	7,979	14,115
1964	D	+9.9%	7,506	6,155	13,687
1960	R	−9.4%	6,008	7,260	13,285
1956	R	−28.8%	4,397	7,959	12,356
1952	R	−25.3%	4,563	7,663	12,246
1948	R	−4.2%	4,745	5,174	10,176
1944	D	+2.8%	4,737	4,482	9,258
1940	D	+9.8%	5,814	4,762	10,683
1936	D	+30.5%	5,614	2,951	8,725
1932	D	+12.1%	4,714	3,671	8,596
1928	R	−15.0%	3,278	4,441	7,744
1924	R	−22.7%	1,869	3,433	6,875
1920	R	−28.0%	2,413	4,348	6,913
1916	D	+11.5%	4,337	3,423	7,962
1912	D	+10.2%	1,505	1,062	4,335
1908	D	+0.7%	2,062	2,033	4,430
1904	R	−21.0%	1,543	2,505	4,588
1900	D	+14.8%	2,763	2,043	4,861
1896	D	+57.5%	3,939	1,057	5,016
1892	D	+1.5%	2,093	2,014	5,280
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: 41.8 in this county, 39.1 nationally

Male

Age

Female

0.4%

85+

1.1%

2.9%

75–84

2.9%

6.2%

65–74

6.5%

6.7%

55–64

7.3%

5.8%

45–54

5.8%

7.0%

35–44

6.6%

6.0%

25–34

6.0%

3.8%

18–24

3.7%

8.1%

5–17

7.9%

2.7%

2.4%

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

Median household income

2024 inflation-adjusted dollars

$78,237

Lewis and Clark County ranks in the top 25% of US counties.

Lewis and Clark County$78,237

Montana$72,509

United States$80,734

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

Poverty rate

All persons below federal poverty line

8.1%

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

Catholic & Orthodox

12.6%

Other Christian

11.2%

Mainline Protestant

4.8%

Pentecostal & Holiness

3.7%

Methodist

1.2%

Baptist

0.9%

Non-Christian

0.4%

Source · 2020 US Religion Census. Remaining 65.2% of residents not counted as adherents by any reporting body.

Home to Helena and a sizable state-government workforce, Lewis and Clark voted within single digits in several recent cycles before settling at R+5.7 in 2024 — a narrower margin than most Montana counties but a notable shift from its earlier swing-county status.

The Democratic margin in Lewis and Clark County has rarely exceeded fifty-seven points in modern history; the Republican margin has rarely exceeded twenty-nine points. 2024 delivered the county to the Republican candidate by six points.

Lewis and Clark County's demographics resemble the country more than they resemble most counties. A 91% non-Hispanic-white share, a 8% poverty rate, and a median household income of $78,237 — all within the broad national range. The county's voting pattern over the last decade is most similar to that of Albany County and Klickitat County.

Most similar counties

Lewis and Clark County votes the way the country votes.