How many people live in Cascade County, MT?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 84,500 people living in Cascade County, MT. That makes Cascade County the fifth-most populous county in Montana. It is home to 7.4% of people living in the state.
84.5K
population of Cascade County, MT (2024)
7.4%
County share of the Montana population (2024)
About 84,500 people lived in Cascade County, MT in 2024.
Population estimates, 2000–2024
What are Cascade County, MT’s age demographics?
About 17,300 Cascade County residents are aged 65 and older in 2024. That represents 20.4% of its population. For comparison, the age group represents 21.1% of Montana’s population and 18% in the US overall.
Another 18,400 Cascade County residents, or 21.8% of the population, were children under 18. For comparison, the age group represents 20.5% of Montana’s population and 21.6% in the US overall.
A lower share of Cascade County, MT's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Cascade County, MT’s racial and ethnic demographics?
Non-Hispanic white residents make up 83.6% of the Cascade County, MT population, higher than the national share of 57.5%. Cascade County, MT also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (4.3%) than the US overall (0.72%).
In contrast, Cascade County’s Hispanic population accounts for 5.7%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.4% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Cascade County, MT has a higher share of a non-Hispanic two or more races population than Montana as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Cascade County, MT is Great Falls with about 60,000 residents in 2024.
Cities and towns in Cascade County, MT ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Great Falls | 60,013 |
| 2. | Cascade | 579 |
| 3. | Belt | 515 |
| 4. | Neihart | 42 |
| 5. | Balance of Cascade County | 23,374 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
