[2] Cascade County comprises the Great Falls, MT Metropolitan Statistical Area.

At the time of the Lewis and Clark Expedition, Cascade County was the territory of the Blackfeet.

[4] The United States Army once had Fort Shaw as an outpost in the northwest part of the county.

A portion of the Adel Mountains Volcanic Field is in the county's southwest corner.

In 2020, Donald Trump won the county with over 58% of the vote, the best performance by a Republican since 1920.

Since at least 1984, no Democrat has won in Montana without winning Cascade County,[11] however, Republicans have occasionally won statewide without carrying the county, such as former Senator Conrad Burns in 1988 and 2000,[12][13] Governors Marc Racicot in 1992 and Judy Martz in 2000,[14][15] Secretaries of State Bob Brown in 2000 and Brad Johnson in 2004,[16][17] and Attorney General Tim Fox in 2012.

[21] In 2009, Benefis, Great Falls Clinic, National Electronics Warranty and Walmart were the largest private employers.

Those films shot in the county and outside Great Falls city limits include: