Cascade County, Montana Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in Montana

The population of Cascade County, Montana is 84,601 as of the 2023 American Community Survey, making it the 5th-largest county in Montana. The median household income is $66,203, the median home value is $243,300, and the median age is 38.3.

The population of Cascade County has grown 3.7% since 2010 (81,513 → 84,523), a +0.26% annualized rate.

Cascade County within Montana · Source: US Census TIGER/Line via us-atlas

84,601

Population

+0.26%

Annual growth

People / sq mi

$66,203

Median Income

$243,300

Median Home Value

Cascade County covers 2,698 sq mi of land at 31.4 people per square mile.

About Cascade County, MT

Cascade County is distinguished by its share of foreign-born residents, 38.6% of the population. With 84,601 residents, Cascade County is a county in Montana. That makes it one of the ten largest counties in Montana in the country, at #5 by population.

The typical household here earns about $66,203, below the US median of $78,538. Poverty runs at 7.5%, below the national 12.4%. The median home value is $243,300, with typical rent around $902.

Educational attainment is on the higher side for US counties — 28.7% of adults hold a four-year degree, below the national 35.0%. Remote work is below the national 14.0% at 7.0%, and the average commute runs about 17 minutes each way.

The large foreign-born share is a defining thread in Cascade County, shaping language, household composition, and the labor force behind the economic figures above.

Cascade County Population History (2010-2024)

The county of Cascade County had a population of 81,513 in 2010 and 84,523 in 2024, a 3.7% growth over 14 years. The peak was 84,908 in 2022. Average annual growth rate: 0.26%.

Cascade County population, 2010–2024 · Source: U.S. Census Bureau — decennial census & Population Estimates

84,523

Population (2024)

81,513

Population (2010)

84,908

Peak (2022)

0.26%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	81,513	-	-	estimate
2011	81,734	+221	+0.27%	estimate
2012	81,657	-77	-0.09%	estimate
2013	82,241	+584	+0.72%	estimate
2014	82,118	-123	-0.15%	estimate
2015	81,959	-159	-0.19%	estimate
2016	81,655	-304	-0.37%	estimate
2017	81,729	+74	+0.09%	estimate
2018	81,756	+27	+0.03%	estimate
2019	81,393	-363	-0.44%	estimate
2020	84,411	+3,018	+3.71%	estimate
2021	84,565	+154	+0.18%	estimate
2022	84,908	+343	+0.41%	estimate
2023	84,625	-283	-0.33%	estimate
2024	84,523	-102	-0.12%	estimate

Race & Ethnicity

White	84.7%
Black or African American	1.5%
Asian	0.0%
Hispanic or Latino (any race)	6.7%
Two or More Races	0.0%

Age & Sex

38.3

Median Age

49.0%

Female

51.0%

Male

19.4%

Age 65+

Age Distribution

Under 5

5.9%

5–9

6.4%

10–14

6.4%

15–19

5.6%

20–24

7.0%

25–34

14.1%

35–44

12.2%

45–54

10.3%

55–59

5.7%

60–64

7.1%

65–74

11.2%

75–84

5.7%

85+

2.5%

Children (under 15): 18.7% · Seniors (65+): 19.4%

Income & Poverty

Median household income	$66,203$-3,719 vs state
Mean household income	$85,695
Per-capita income	$36,562
Poverty rate	7.5%+0.4% vs state
Unemployment rate	1.8%
Employment-to-population	56.9%

Top Industries by Employment

Professional & business services

26.4%

Education & health care

10.0%

Construction

8.0%

Finance & real estate

7.5%

Information

5.9%

Arts, entertainment & food

5.8%

Public administration

5.6%

Manufacturing

5.2%

The largest employment sector in Cascade County is professional & business services, accounting for 26.4% of workers.

How residents commute

0.7%

Drive alone

2.3%

Carpool

77.9%

Public transit

7.0%

Work from home

16.6 min

Avg commute

Housing

$243,300$-94,800 vs state

Median home value

$902

Median rent

70.2%

Homeownership rate

39,248

Total housing units

88.9%

Occupied

11.1%

Vacant

29.8%

Renter-occupied

Social & access

93.3%

With health insurance

93.1%

With broadband internet

38.6%

Foreign-born

13.3%

Veterans (18+)

15.7%

With a disability

96.3%

Speak language other than English at home

Education

93.9%

High School+

28.7%

Bachelor's+

Largest cities in Montana

Billings (118,321)Missoula (75,600)Great Falls (60,412)Bozeman (55,042)Butte-Silver Bow (34,929)Helena (33,126)Kalispell (26,830)Belgrade (11,425)All Montana cities →

Other counties in Montana

Yellowstone County (167,340)Gallatin County (122,194)Missoula County (119,639)Flathead County (108,445)Lewis and Clark County (72,580)Ravalli County (45,807)Silver Bow County (35,589)Lake County (32,073)Lincoln County (20,656)Park County (17,484)All Montana counties →

Part of Montana

Montana demographic profile All Montana data →

Metro areas in Montana

Billings (187,269)Missoula (124,435)Bozeman (122,194)Helena (92,391)Great Falls (84,601)All US metros →

County rankings

US Counties by Population Richest US Counties by Median Household Income Expensive US Counties by Home Value Educated US Counties Counties With Highest Poverty Rates Youngest US Counties by Median Age Oldest US Counties by Median Age Cheapest US Counties by Median Home Value Racially Diverse US Counties Counties With Largest Hispanic Population All rankings →

Frequently Asked Questions

Cascade County, Montana has a population of 84,601 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in Montana. Population density is 31 people per square mile.

The population of Cascade County has grown 3.7% since 2010 (81,513 → 84,523), a +0.26% annualized rate.

The median household income in Cascade County, Montana is $66,203, with mean (average) household income of $85,695 and per-capita income of $36,562. 7.5% of residents live below the federal poverty level.

In Cascade County, the largest racial and ethnic groups are White (84.7%), Hispanic or Latino (6.7%), Black or African American (1.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Cascade County, Montana is 38.3 years. Residents are 49.0% female and 51.0% male.

The median home value in Cascade County is $243,300 and median monthly rent is $902. 70.2% of occupied housing units are owner-occupied. The county has 39,248 total housing units, 11.1% of which are vacant.

The largest employment sector in Cascade County, Montana is professional, scientific, and management services, employing 26.4% of workers. The unemployment rate is 1.8%.

Billings is among the largest cities associated with Cascade County, Montana, with a population of 118,321.