[2] The county was named for Charles Arthur Broadwater, a noted Montana railroad, real estate, and banking magnate.

[3] The Lewis and Clark Expedition traveled through what is now Broadwater County as they traced the Missouri River.

Broadwater County is perhaps best known as the home of Canyon Ferry Lake, the third largest body of water in Montana.

The lake provides essential irrigation to local farms, and serves as a recreation destination for the region, with fishing, boating, swimming, camping, and wildlife viewing opportunities.

RY Timber and Wheat Montana Bakery were the largest private employers according to the 2000 Census.