Cass County, North Dakota Population 2026

Updated April 2026 · US Census ACS 2023 5-Year Estimates · 1st-largest in North Dakota

The population of Cass County, North Dakota is 189,286 as of the 2023 American Community Survey, making it the 1st-largest county in North Dakota. The median household income is $75,023, the median home value is $284,700, and the median age is 32.9.

The population of Cass County has grown 33.7% since 2010 (150,321 → 200,945), a +2.09% annualized rate.

Cass County within North Dakota · Source: US Census TIGER/Line via us-atlas

189,286

Population

+2.09%

Annual growth

107

People / sq mi

$75,023

Median Income

$284,700

Median Home Value

Cass County covers 1,765 sq mi of land at 107.2 people per square mile.

About Cass County, ND

Cass County is a county in North Dakota with a population of 189,286. It ranks #1 among counties in North Dakota by population. The median age is 32.9, younger than the national median. The population is 50.7% male and 49.3% female.

The median household income in Cass County is $75,023, near the US median of $74,580. 5.0% of residents live below the federal poverty level. Home values sit at a median of $284,700, with monthly rent averaging $930. The homeownership rate of 52.0% is lower than the national rate of 64.8%.

Educational attainment in Cass County reflects 43.3% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 8.7% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 17.5 minutes each way.

Cass County Population History (2010-2024)

The county of Cass County had a population of 150,321 in 2010 and 200,945 in 2024, a 33.7% growth over 14 years. The peak was 200,945 in 2024. Average annual growth rate: 2.10%.

200,945

Population (2024)

150,321

Population (2010)

200,945

Peak (2024)

2.10%

Avg Annual Growth

Year	Population	Change	Annual %	Source
2010	150,321	-	-	estimate
2011	153,363	+3,042	+2.02%	estimate
2012	157,534	+4,171	+2.72%	estimate
2013	163,027	+5,493	+3.49%	estimate
2014	166,792	+3,765	+2.31%	estimate
2015	171,028	+4,236	+2.54%	estimate
2016	174,562	+3,534	+2.07%	estimate
2017	178,122	+3,560	+2.04%	estimate
2018	180,861	+2,739	+1.54%	estimate
2019	182,238	+1,377	+0.76%	estimate
2020	184,897	+2,659	+1.46%	estimate
2021	189,330	+4,433	+2.40%	estimate
2022	193,670	+4,340	+2.29%	estimate
2023	198,157	+4,487	+2.32%	estimate
2024	200,945	+2,788	+1.41%	estimate

Race & Ethnicity

White	83.5%
Black or African American	6.5%
Asian	0.0%
Hispanic or Latino (any race)	2.5%
Two or More Races	0.0%

Age & Sex

32.9

Median Age

49.3%

Female

50.7%

Male

12.8%

Age 65+

Age Distribution

Under 5

6.4%

5–9

6.5%

10–14

6.2%

15–19

7.3%

20–24

10.6%

25–34

16.7%

35–44

13.9%

45–54

9.9%

55–59

5.0%

60–64

4.7%

65–74

7.7%

75–84

3.5%

85+

1.6%

Children (under 15): 19.1% · Seniors (65+): 12.8%

Income & Poverty

Median household income	$75,023$-926 vs state
Mean household income	$101,854
Per-capita income	$44,593
Poverty rate	5.0%-1.2% vs state
Unemployment rate	2.3%
Employment-to-population	73.5%

Top Industries by Employment

Professional & business services

28.1%

Finance & real estate

10.8%

Education & health care

8.7%

Manufacturing

8.7%

Information

7.9%

Construction

7.1%

Arts, entertainment & food

4.5%

Retail trade

4.0%

The largest employment sector in Cass County is professional & business services, accounting for 28.1% of workers.

How residents commute

0.7%

Drive alone

2.7%

Carpool

79.5%

Public transit

8.7%

Work from home

17.5 min

Avg commute

Housing

$284,700+$43,600 vs state

Median home value

$930

Median rent

52.0%

Homeownership rate

87,497

Total housing units

93.3%

Occupied

6.7%

Vacant

48.0%

Renter-occupied

Social & access

94.3%

With health insurance

96.1%

With broadband internet

37.2%

Foreign-born

5.7%

Veterans (18+)

10.5%

With a disability

91.7%

Speak language other than English at home

Education

95.8%

High School+

43.3%

Bachelor's+

Largest cities in North Dakota

Fargo (129,064)Bismarck (74,146)Grand Forks (58,882)Minot (47,922)West Fargo (39,325)Williston (27,964)Dickinson (25,216)Mandan (24,293)Jamestown (15,774)All North Dakota cities →

Other counties in North Dakota

Burleigh County (98,986)Grand Forks County (72,764)Ward County (69,232)Williams County (39,368)Morton County (33,479)Stark County (33,116)Stutsman County (21,525)Richland County (16,550)McKenzie County (14,280)Rolette County (12,065)All North Dakota counties →

Part of North Dakota

North Dakota demographic profile All North Dakota data →

Metro areas in North Dakota

Fargo (254,914)Bismarck (134,286)Grand Forks (103,669)Minot (76,773)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

Cass County, North Dakota has a population of 189,286 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 1st-largest county in North Dakota. Population density is 107 people per square mile.

The population of Cass County has grown 33.7% since 2010 (150,321 → 200,945), a +2.09% annualized rate.

The median household income in Cass County, North Dakota is $75,023, with mean (average) household income of $101,854 and per-capita income of $44,593. 5.0% of residents live below the federal poverty level.

In Cass County, the largest racial and ethnic groups are White (83.5%), Black or African American (6.5%), Hispanic or Latino (2.5%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.

The median age in Cass County, North Dakota is 32.9 years. Residents are 49.3% female and 50.7% male.

The median home value in Cass County is $284,700 and median monthly rent is $930. 52.0% of occupied housing units are owner-occupied. The county has 87,497 total housing units, 6.7% of which are vacant.

The largest employment sector in Cass County, North Dakota is professional, scientific, and management services, employing 28.1% of workers. The unemployment rate is 2.3%.

Fargo is among the largest cities associated with Cass County, North Dakota, with a population of 129,064.