What is the largest city in Cass County, ND?

Fargo is the largest city or town in Cass County, with about 131,627 residents.

How many ZIP codes are in Cass County?

Cass County includes 24 ZIP Code Tabulation Areas, including 58002, 58004, 58005, 58006, 58007.

What is the population of Cass County, ND?

About 193,400 people live in Cass County, based on American Community Survey 5-year estimates.

What counties border Cass County?

Cass County borders Clay County, MN, Richland County, Barnes County, Traill County, Norman County, MN, Ransom County, Steele County.

Cass County, ND: Cities, ZIP Codes & Local Data

Population

193,400

Land area

1,765sq mi

People per sq mi

110

ZIP codes

24

Cass County at a glance

Cass County is about 9.6 times as dense as North Dakota as a whole.
It is the most populous county in North Dakota.
The median household income is $75,555, close to the North Dakota median.
A typical owner-occupied home is valued at $298,000 (19% above North Dakota) and median rent is $958 a month.
The biggest population centers are Fargo (131,627), West Fargo (40,094) and Horace (4,588).

Local data for Cass County, ND

Counts from official public data

Housing and community stats

Cass County, ND, American Community Survey 2020-2024

Full profile

Median household income

$75,555

Poverty rate

11.0%

Median home value

$298,000

Prices +3.1% in a year

Median rent

$958/mo

Homeownership

52.0%

Bachelor's or higher

42.6%

Median age

32.8

Average commute

17.1 min

Largest reported origins and ancestries: German Americans (67,826), Norwegian Americans (47,748), Irish Americans (14,661).

Home values and rents Income, education and commute

Economy and federal money

Jobs, income, federal spending and pandemic loans

Details

Unemployment rate

2.0%

Aug 2026, -0.4 pts in a year

Average annual pay

$68,760

128,690 jobs, 2025

Income per person

$74,118

BEA, 2024

Federal spending

$87.22B

FY 2026, $472,687 per person

PPP loans

$710M

7,862 loans, 76,364 jobs reported

Campaign donations

$1.85M

Itemized, 2026 cycle

Economy Federal spending PPP loans

How people get to work

Cass County, ND, workers 16 and older. American Community Survey 5-year estimates

Drove alone78.2%
Carpooled6.5%
Public transit0.5%
Walked2.8%
Bicycle0.3%
Taxi, ride-hailing, motorcycle or other1.7%
Worked from home10.0%

Average one-way commute: 17.1 minutes for people who do not work from home.

Environment and hazard risk

Cass County, ND, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Moderate

Top: winter weather

Storm events since 1996

1,256

Most often hail

Flood insurance policies

2,113

4.5% of homes, county

July high / Jan low

81° / -1°F

24.2 inches of rain a year

Hazards, floods and storm history Check a flood zone 22 historic places

Health statistics

Share of adults in Cass County, ND, CDC PLACES estimates

All 40 measures

Obesity

33.8%

U.S. 33.3% +0.5 pts

Diabetes

7.9%

U.S. 12.1% -4.2 pts

Smoking

11.2%

U.S. 12.8% -1.6 pts

Uninsured (18-64)

6.3%

U.S. 11.1% -4.8 pts

Cities, towns and ZIP codes in Cass County

Population shown

Frequently asked questions

What is the largest city in Cass County, ND?: Fargo is the largest city or town in Cass County, with about 131,627 residents.
How many ZIP codes are in Cass County?: Cass County includes 24 ZIP Code Tabulation Areas, including 58002, 58004, 58005, 58006, 58007.
What is the population of Cass County, ND?: About 193,400 people live in Cass County, based on American Community Survey 5-year estimates.
What counties border Cass County?: Cass County borders Clay County, MN, Richland County, Barnes County, Traill County, Norman County, MN, Ransom County, Steele County.