Cascade County, Montana

Cascade County population, land area and income

Cascade County had 84,523 residents in the Census Vintage 2024 estimate, on 2,698.2 square miles of land. It ranks 5th of 56 in Montana by population and 21st by land area. That works out to 31.3 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Montana has 7,814 residents, so Cascade County is 10.8 times that size.

Its SAIPE 2023 median household income of $65,018 is above the national county median among 3,143 counties with an estimate.

How Cascade County's population changed since 2020

Cascade County gained 112 residents between the July 2020 and July 2024 estimates, a rise of 0.1%. That ranks 36th of 56 in Montana for growth. The median Montana county changed by +2.8%, and the state as a whole by +4.6%.

Since the April 2020 estimates base, Cascade County recorded 3,940 births and 4,385 deaths, a natural change of -445. Net international migration added +15 and net domestic migration, people moving to or from other US counties, came to +504. The largest single component was domestic migration, which added 504 people.

Where Cascade County is

The Census internal point of Cascade County is at 47.316600, -111.350300. It sits in UTM zone 12N. The map shades Montana's 56 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Cascade County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Cascade County

One incorporated place of 1,000+ people has residents in Cascade County, 60,013 people together, or 71% of the county. Each figure counts only the part of the town inside Cascade County; towns marked "part" extend into another county. The largest is Great Falls with 60,013.

Counties bordering Cascade County

The Census 2024 county adjacency file lists 5 neighbors for Cascade County. The most populous is Lewis and Clark County, MT, with 75,129 residents. Distances run between Census internal points in a straight line.

• Lewis and Clark County

  75,129 people

  50 mi WSW

• Teton County

  6,444 people

  56 mi NW

• Chouteau County

  5,880 people

  58 mi NE

• Judith Basin County

  2,111 people

  53 mi ESE

• Meagher County

  2,065 people

  54 mi SSE

Distance to Helena and the nearest big city

Helena is 59.5 miles SSW of Cascade County's internal point in a straight line. The nearest place of 100,000 or more is Billings, MT (population 121,483), 169.8 miles away. The nearest place of 10,000 or more is Great Falls, MT (population 60,013), 13.0 miles away.

Cascade County FIPS code

The FIPS code of Cascade County is 30013: state code 30 for Montana plus county code 013. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $65,018.