United States › Montana › Jefferson County COUNTY
Jefferson County Montana · 13,329 residents (2025 est.) · 1,657 sq mi
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The short version
Jefferson County is a county of 12,774 people in Montana. The median age is 47.1, about 8 years above the US median. Owners hold 84% of the housing stock. That puts it in the top 2% of US counties for household income. Density works out to 8 people per square mile. 1% of people here were born outside the United States.
At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 47.1
US median: 38.9
Average education
32% hold a bachelor's degree
US average: 36%
Less affordable
home values up 92%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 10,049 in 2000
13,329 in 2025 (Census Bureau estimate)
from 7 / sq mi in 2009
US average: 281
from 40.2 in 2000
US average: 38.9
Population, 1990 – 2024
7K 9K 10K 12K 13K 1990 2000 2010 2020 2024 Jefferson County Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $95,490
+26%inflation adjusted, since 2000
from $41,506 in 2000
US average: $82,259
from $18,250 in 2000
US average: $44,673
Households earning $100K+
from 35.3% in 2009
US average: 53.3%
from 9.0% in 2000
US average: 12.5%
from 0.397 in 2010
US average: 0.476
Workforce by industry, 2024
Agriculture, forestry, fishing 6%
Professional, scientific, technical 3.9%
Arts, entertainment, food 2.6%
Public administration 2.5%
Transportation & warehousing 0.5%
Education & health services 0.2%
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$446,900
+92%inflation adjusted, since 2000
from $127,700 in 2000
US average: $376,019
$925
+21%inflation adjusted, since 2000
from $419 in 2000
US average: $1,442
from 83.2% in 2000
15.8% rent
from 12.9% in 2009
US average: 10.0%
2.50 people
−13%since 2009
from 2.88 people in 2009
US average: 2.54
from 17.0% in 2009
US average: 22.9%
from 23.6% in 2009
US average: 47.4%
from 3.6 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 95.2%(9,564)
Hispanic / Latino 1.5%(149)
2024
White, non-Hispanic 90.6%(11,569)
from 13 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
from 9 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 23 more ancestry groups with data from 27.7% in 2000
US average: 35.6%
High school or higher
from 90.2% in 2000
US average: 89.6%
from 8.9% in 2000
US average: 14.0%
Section 06
Commute & transportation from 14.9 min in 2000
US average: 26.5
from 70.7% in 2009
US average: 68.9%
from 12.9% in 2009
US average: 8.5%
from 0.0% in 2009
US average: 3.2%
from 12.8% in 2009
US average: 15.0%
from 2.4% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 2.2% in 2009
US average: 8.3%
Section 07
Work & employment from 5.0% in 2011
US average: 5.2%
from 62.8% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 70.2% in 2020
US average: 74.6%
from 20.4% in 2009
US average: 13.1%
from 38.9% in 2009
US average: 42.5%
Section 08
People & community from 1.5% in 2009
US average: 14.1%
from 15.1% in 2009
US average: 6.2%
from 13.1% in 2012
US average: 13.3%
from 11.4% in 2013
US average: 8.4%
from 77.8% in 2017
US average: 91.0%
Computer in household
from 93.5% in 2020
US average: 95.5%
from 86.5% in 2020
US average: 87.7%
from 97.6% in 2016
US average: 77.7%
from 0.6% in 2016
US average: 13.6%
Marital status
Men 15+
Never married 24.6%(1,334)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 11.4% in 2013
US average: 8.4%
from 55.6% in 2020
US average: 54.8%
Direct-purchase
from 19.3% in 2020
US average: 13.8%
from 22.8% in 2020
US average: 18.4%
from 15.8% in 2020
US average: 20.9%
VA health care
from 5.9% in 2020
US average: 2.2%
Any private
from 74.6% in 2020
US average: 67.1%
Any public
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)
Gulf War (1990s) 44.7%(477)
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.
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Drill deeper
Places similar to Jefferson County Head to head
Compare Jefferson County to nearby counties JEFFERSON COUNTY VS
Broadwater County
Income $70,374 −26%
Home value $426,600 −5%
Population 8,493 −36%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Silver Bow County
Income $61,754 −35%
Home value $255,200 −43%
Population 36,118 +171%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Deer Lodge County
Income $57,527 −40%
Home value $231,700 −48%
Population 9,709 −27%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Madison County
Income $75,250 −21%
Home value $470,100 +5%
Population 10,026 −25%
SEE FULL COMPARISON →
Frequently asked
How many people live in Jefferson County, Montana? Jefferson County, Montana has about 12,774 residents according to the 2024 American Community Survey.
What is the median household income in Jefferson County, Montana? The typical household in Jefferson County, Montana earns about $95,490 a year. Half of households make more than that, and half make less.
Is Jefferson County, Montana expensive? In Jefferson County, Montana, the median home is worth about $446,900, and the typical rent is about $925 a month.
How educated are people in Jefferson County, Montana? About 32.2% of adults age 25 and over in Jefferson County, Montana hold a bachelor's degree or higher.
What is the poverty rate in Jefferson County, Montana? About 5.7% of people in Jefferson County, Montana live below the federal poverty line.
Has Jefferson County, Montana grown since 1990? Yes, Jefferson County, Montana has grown since 1990. The population has added about 4,835 residents, a change of about 61 percent over that period.
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