In 2022, Jefferson County, MT had a population of 12.3k people with a median age of 47.4 and a median household income of $73,875. Between 2021 and 2022 the population of Jefferson County, MT grew from 12,057 to 12,273, a 1.79% increase and its median household income grew from $72,500 to $73,875, a 1.9% increase.
The 5 largest ethnic groups in Jefferson County, MT are White (Non-Hispanic) (91.3%), Two+ (Non-Hispanic) (3.93%), White (Hispanic) (1.89%), American Indian & Alaska Native (Non-Hispanic) (1%), and Other (Hispanic) (0.521%).
None of the households in Jefferson County, MT reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.1% of the residents in Jefferson County, MT are U.S. citizens.
In 2022, the median property value in Jefferson County, MT was $354,700, and the homeownership rate was 83.1%.
Most people in Jefferson County, MT drove alone to work, and the average commute time was 22.8 minutes. The average car ownership in Jefferson County, MT was 3 cars per household.
Jefferson County, MT borders .