Jefferson   County MT United States

County FIPS 30043
Largest City Montana City
State Montana
Latitude 46.1485
Longitude -112.0938
Population 12,774
Density 7.72 people per square mile
Time Zone America/Denver
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $95,490
Median individual: $41,557

Race

Mode: 91.7% White

Gender

 50.6% male 

Rent

  $925 / month  

Median house value: $432,684.0

Age

Median: 47.1 years old

Education

With at least college degree: 32.1%
With STEM degree: 54.3%

Marital Status

 63.6% married 

Never married: 21.4%

Labor Force Participation

 60.8% working 

Unemployed: 4.2%

Average Family Size

 2.86 people 

Commute Time

 24.4 minutes 

Health Care

 5.8% uninsured 

Poverty

 5.7%

All data comes from the SimpleMaps US Counties Database, 2026.

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