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Jefferson County

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Jefferson County, Administrative county in southwestern Montana, United States.

Description

Jefferson County is an administrative county in southwestern Montana, positioned between the cities of Helena and Butte. The area includes portions of two national forests and supports a number of small communities within its boundaries.

History

The county was established in 1865 and named after President Thomas Jefferson. This founding occurred during a period of growth and development in the western United States.

Culture

The Boulder community functions as both the county seat and central location for governmental operations, serving a population of over 12,000 residents.

Practical

Major routes including Interstate 15, Interstate 90, U.S. Highway 12, and U.S. Highway 287 run through the county. These roads make it straightforward to travel between communities and reach neighboring regions.

Did you know?

The Sheriff's Office maintains a CodeRED emergency notification system that delivers immediate alerts about safety concerns to county inhabitants.

Location
Inception
February 2, 1865
Capital city
Boulder
Shares border with
Lewis and Clark County, Silver Bow County, Madison County, Deer Lodge County, Powell County, Broadwater County, Gallatin County
GPS coordinates
46.18000,-112.11000
Latest update
December 8, 2025 13:43

AroundUs brings together thousands of curated places, local tips, and hidden gems, enriched daily by 60,000 contributors worldwide. Discover all places nearby (Montana).

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Administrative divisions
« Jefferson County - Administrative county in southwestern Montana, United States » is provided by Around Us (aroundus.com). Images and texts are derived from Wikimedia project under a Creative Commons license. You are allowed to copy, distribute, and modify copies of this page, under the conditions set by the license, as long as this note is clearly visible.

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