COUNTY · 2000 CENSUS

Jefferson County

Montana · 10,049 residents · 1,657 sq mi

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Jefferson County is home to 10,049 people in Montana. Owners hold 83% of the housing stock. The median age is 40.2, about 5 years above the US median. Growth has run 27% since 1990, or 2,110 more people. That is roughly 26% ahead of the Montana median. Median rent is $419 a month.

At a glance

Average income

near the US median

US median: $42,589

Older

median age 40.2

US median: 35.2

More educated

28% hold a bachelor's degree

US average: 24%

Less affordable

home values up 51%, inflation adjusted

US median home: $120,530

Section 01

Population & growth

Total population

10,049

+27%since 1990

from 7,939 in 1990

1990 – 2025

Median age

40.2

+15%since 1990

from 35.1 in 1990

US average: 35.2

Land area

1,657 sq mi

Population, 1990 – 2024

202413K

Age distribution, 2000

Under 55.2%(524)

US avg: 6.8%

5 to 97.3%(736)

US avg: 7.3%

10 to 149.6%(968)

US avg: 7.3%

15 to 198.2%(822)

US avg: 7.2%

20 to 242.7%(267)

US avg: 6.7%

25 to 348.4%(843)

US avg: 14.2%

35 to 4418.4%(1,851)

US avg: 16%

45 to 5418.9%(1,903)

US avg: 13.4%

55 to 6410.9%(1,100)

US avg: 8.6%

65 to 746.1%(616)

US avg: 6.5%

75 to 843.1%(308)

US avg: 4.4%

85 and over1.1%(111)

US avg: 1.5%

BAR + DOT: THIS PLACE · TICK: US AVERAGE

Section 02

Income & economy

Median household income

$41,506

Unchangedinflation adjusted, since 1990

from $31,400 in 1990

US average: $42,589

1990 – 2024

Per capita income

$18,250

+38%since 1990

from $13,233 in 1990

US average: $21,522

Poverty rate

9.0%

+1.6 ptssince 1990

from 7.4% in 1990

US average: 12.4%

Section 03

Housing

Median home value

$127,700

+51%inflation adjusted, since 1990

from $64,000 in 1990

US average: $120,530

1990 – 2024

Median gross rent

$419

+6%inflation adjusted, since 1990

from $299 in 1990

US average: $602

Owner-occupied

83.2%

+2.5 ptssince 1990

from 80.7% in 1990

16.8% rent

Section 04

Race & ethnicity

1990

White, non-Hispanic97.5%(7,744)

Black0%(2)

Hispanic / Latino1%(82)

Asian0.2%(14)

2000

White, non-Hispanic95.2%(9,564)

Black0.1%(13)

Hispanic / Latino1.5%(149)

Asian0.4%(42)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin

Mexican1.6%(202)

South American0.4%(47)

Venezuelan0.4%(47)

Spaniard0.1%(17)

Puerto Rican0.1%(16)

Cuban0.1%(14)

Asian origin

Korean0.3%(41)

Japanese0.1%(9)

Pacific Islander origin

Native Hawaiian0%(5)

Ancestry

German24.6%(3,145)

English19.7%(2,514)

Irish19%(2,428)

Norwegian9%(1,153)

Swedish4.4%(557)

Scottish3.6%(457)

Polish2.8%(353)

American2.7%(347)

French2.7%(340)

Italian2.6%(327)

Scotch-Irish2.5%(325)

Dutch2.4%(305)

+ 23 more ancestry groups with data

Danish1.6%(207)

French Canadian1.6%(204)

Czech1.3%(165)

Finnish1.1%(146)

Russian1.1%(140)

Welsh0.7%(94)

British0.5%(67)

Slovene0.5%(62)

Greek0.5%(61)

Austrian0.4%(54)

Swiss0.3%(36)

Romanian0.3%(35)

Croatian0.2%(20)

Canadian0.1%(18)

Ukrainian0.1%(16)

Hungarian0.1%(15)

West Indian0.1%(13)

Jamaican0.1%(13)

Serbian0.1%(11)

Armenian0.1%(9)

Belgian0.1%(9)

Lithuanian0.1%(8)

Bulgarian0%(6)

RANKED:Largest German population · Largest English population · Largest Irish population · Largest Norwegian population · Largest Swedish population

Section 05

Education

Bachelor's degree or higher

27.7%

+6.8 ptssince 1990

from 20.8% in 1990

US average: 24.4%

High school or higher

90.2%

+8.9 ptssince 1990

from 81.3% in 1990

US average: 80.3%

Graduate degree

8.9%

+3.8 ptssince 1990

from 5.2% in 1990

US average: 8.8%

Section 06

Commute & transportation

Average commute

14.9 min

−26%since 1990

from 20.2 min in 1990

US average: 17.6

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status

Men 15+

Never married19.6%(775)

Married68.5%(2,710)

Widowed2.4%(94)

Divorced9.5%(376)

Women 15+

Never married14.1%(548)

Married68.7%(2,665)

Widowed7.4%(285)

Divorced9.8%(379)

SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000

Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured

5.8%

−5.6 ptssince 2013

from 11.4% in 2013

US average: 8.4%

Employer-based

52.0%

−3.6 ptssince 2020

from 55.6% in 2020

US average: 54.8%

Direct-purchase

20.1%

+0.8 ptssince 2020

from 19.3% in 2020

US average: 13.8%

Medicare

24.2%

+1.4 ptssince 2020

from 22.8% in 2020

US average: 18.4%

Medicaid

15.5%

−0.3 ptssince 2020

from 15.8% in 2020

US average: 20.9%

VA health care

5.8%

−0.1 ptssince 2020

from 5.9% in 2020

US average: 2.2%

Any private

72.9%

−1.7 ptssince 2020

from 74.6% in 2020

US average: 67.1%

Any public

39.4%

+0.1 ptssince 2020

from 39.3% in 2020

US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024

Gulf War (2001 or later)29.5%(315)

US avg: 26.4%

Gulf War (1990s)44.7%(477)

US avg: 24.3%

Vietnam era31.4%(335)

US avg: 33.1%

Korean War0%(0)

US avg: 4.5%

World War II0%(0)

US avg: 1%

Share of the 1,067 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE

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