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Beaverhead County, in the southwestern
corner of the state, was organized as one of the original
territorial counties on February 2,1865. It was named for the
rock which Sacajawea pointed out to Lewis and Clark, explaining
that her people had called it that because it resembled a
beaver's head. It was one of the smallest of the original
counties, but is now one of the largest. Beaverhead County
maintained its original area throughout all the county dividing,
and the only change in its borders was made by an annexation of
a part of Madison County in 1911. It contains Montana's oldest
town, Bannack City, where a post office was established in
Beaverhead County is the largest county by area at 5,572 square
The county seat was the old mining town of Bannack until 1881.
The county seat is now Dillon.
The Big Hole river runs through the county.
Beaverhead County is definitely cattle and hay country.
Co., MT -
Madison Co., MT -
Silver Bow Co., MT
Co., ID -
Co., ID -
Fremont Co., ID
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