Welcome to Jefferson County

Jefferson County has something for everyone; from rivers for floating and fishing, to hiking and climbing in the Elkhorn Mountain range, and a large motorized and non-motorized trail system. Boulder, High Ore and Basin are home to several radon health mines, ghost towns, Boulder Hot Springs and Whitehall hosts Frontier Days every July. The county fair is held in Boulder in August. Jefferson County abounds with natural resources and its economy is based around these, including production agriculture, wood products and mining.

The Latest...

The Census begins in mid-March 2020. Counting everyone in Montana is critical because it determines the state’s share of federal funding over the next decade, it shapes local voting districts, and it determines whether Montana will get another representative in Congress. This year you'll be able to fill out the census online. For more information click here.

link to census Youtube video
ATTENTION JEFFERSON COUNTY RESIDENTS- Community and Health Services Survey: February 7-29, 2020 Please complete the survey to let planners know your preferences: