Data / Population / Cascade County

Population in Cascade County

Population in Cascade County was 85,029 in 2025, according to the U.S. Census Bureau. That is up 0.4% from 2024. That is the 5th highest of 56 counties in 2025.

2025, persons85,029
Change on 2024+0.4%
Rank5th of 56Counties in Montana ranked
Series high85,0292025
Series low84,4102020

Population in Cascade County, 2020 to 2025

CSVChart (SVG)

84.4K84.6K84.8K85K85.2K2020202120222023202420252020: 84,410 persons2021: 84,569 persons2022: 84,908 persons2023: 84,623 persons2024: 84,668 persons2025: 85,029 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202585,029
202484,668
202384,623
202284,908
202184,569
202084,410

Compared with Montana and United States

Place2025
Cascade County85,029
Montana1,144,694
United States341,784,857

Rankings

Definition

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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What is the latest population in Cascade County? Cite the source.
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Questions

What is the population in Cascade County?

Population in Cascade County was 85,029 in 2025, according to the U.S. Census Bureau. That is up 0.4% from 2024. That is the 5th highest of 56 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved by Invokely on 2026-10-08.

What was the highest population in Cascade County?

85,029 in 2025, the highest value since 2020 in this series.

More statistics for Cascade County

All statistics for Cascade County