• county
  • FIPS 38017
  • Largest town: Fargo

Cass County, North Dakota

Cass County had 200,945 residents in the Census Vintage 2024 estimate, on 1,764.9 square miles of land. It is the most populous of North Dakota's 53 county-equivalents.

Population
200,945
#1 of 53 in North Dakota · #354 in US
Area
1,764.9 sq mi
#10 of 53 in North Dakota · #337 in US
Density
114 / sq mi
#1 of 53 in North Dakota · #829 in US
Median household income
$75,477
#21 of 53 in North Dakota · #642 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Cass County within North Dakota. Pin: Bismarck.

Measure from here

Tools and pages that start from Cass County

Cass County population, land area and income

Cass County had 200,945 residents in the Census Vintage 2024 estimate, on 1,764.9 square miles of land. It is the most populous of North Dakota's 53 county-equivalents. That works out to 113.9 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in North Dakota has 3,853 residents, so Cass County is 52.2 times that size.

Its SAIPE 2023 median household income of $75,477 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

200,945

3144th1st

354th of 3,144 (US)

Land area

1,765 sq mi

3144th1st

337th of 3,144 (US)

Density

113.9 / sq mi

3144th1st

829th of 3,144 (US)

Median household income

$75,477

3143rd1st

642nd of 3,143 (US)

Rank within North Dakota (53)

Population

200,945

53rd1st

1st of 53 (ND)

Land area

1,765 sq mi

53rd1st

10th of 53 (ND)

Density

113.9 / sq mi

53rd1st

1st of 53 (ND)

Median household income

$75,477

53rd1st

21st of 53 (ND)

How Cass County's population changed since 2020

Cass County gained 16,048 residents between the July 2020 and July 2024 estimates, a rise of 8.7%. That ranks 2nd of 53 in North Dakota for growth. The median North Dakota county changed by -1.3%, and the state as a whole by +2.2%.

Since the April 2020 estimates base, Cass County recorded 10,183 births and 5,649 deaths, a natural change of +4,534. Net international migration added +5,830 and net domestic migration, people moving to or from other US counties, came to +6,016. The largest single component was domestic migration, which added 6,016 people.

184.9k2020189.3k2021193.7k2022198.2k2023200.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
10,183
Deaths
5,649
Net international migration
+5,830
Net domestic migration
+6,016
Change, July 2023 to July 2024
+2,788

Where Cass County is

The Census internal point of Cass County is at 46.927000, -97.252400. It sits in UTM zone 14N. The map shades North Dakota's 53 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Cass County outlined. Dots are towns of 1,000+ people with residents in it.

Burke County: -1.7%Richland County: +0.8%Wells County: -4.1%Renville County: +4.1%Dickey County: -0.6%Bottineau County: +0.3%Hettinger County: -2.0%Sargent County: -3.5%Oliver County: +0.7%McIntosh County: -2.2%Towner County: -4.1%Barnes County: -0.4%Griggs County: -3.2%Cass County: +8.7%Foster County: -1.9%Pierce County: -3.1%Sheridan County: +0.5%Stark County: -0.2%McHenry County: -3.4%Cavalier County: -3.6%Logan County: +0.0%LaMoure County: -1.1%Kidder County: -0.9%Burleigh County: +4.6%Nelson County: +0.3%Eddy County: -0.5%Slope County: -6.0%Billings County: +13.8%Ransom County: -1.8%Grand Forks County: +0.9%McLean County: +0.8%Emmons County: -2.5%Mercer County: +0.0%Morton County: +2.6%Sioux County: -4.3%Pembina County: -3.5%Walsh County: -2.9%Dunn County: -1.6%Adams County: -1.8%Ward County: -2.1%Stutsman County: -0.0%Rolette County: -4.2%Golden Valley County: +4.4%Steele County: -1.3%Traill County: +0.1%Benson County: -3.1%Mountrail County: -3.4%Williams County: -1.0%Grant County: -1.9%Ramsey County: -0.6%McKenzie County: +0.0%Bowman County: -3.2%Divide County: -3.7%
Change 2020 to 2024
  1. < -3.4%
  2. < -1.9%
  3. < -0.6%
  4. < +0.3%
  5. ≥ +0.3%
no data

Orange pin: Cass County internal point. Dark pin: Bismarck.

Internal point

Decimal
46.927000, -97.252400
DMS
46°55'37.20"N 97°15'8.64"W
UTM
14N 633041.8E 5198534.3N
Geohash
cb6ffyycw
Plus code
86R4WPGX+R2

Towns in Cass County

6 incorporated places of 1,000+ people have residents in Cass County, 188,590 people together, or 94% of the county. Each figure counts only the part of the town inside Cass County; towns marked "part" extend into another county. The largest is Fargo with 136,285.

  1. 01Fargo136,285
  2. 02West Fargo41,027
  3. 03Horace6,286
  4. 04Casselton2,486
  5. 05Mapleton1,476
  6. 06Kindred1,030
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Cass County

The Census 2024 county adjacency file lists 7 neighbors for Cass County, including 2 across a state line. The most populous is Clay County, MN, with 66,848 residents. Distances run between Census internal points in a straight line.

Distance to Bismarck and the nearest big city

Bismarck is 166.9 miles W of Cass County's internal point in a straight line. The nearest place of 100,000 or more is Fargo, ND (population 136,285), 20.4 miles away. The nearest place of 10,000 or more is West Fargo, ND (population 41,027), 17.1 miles away.

Cass County FIPS code

The FIPS code of Cass County is 38017: state code 38 for North Dakota plus county code 017. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $75,477.

Questions people ask

What is the population of Cass County, North Dakota?

The Census Vintage 2024 estimate for July 1, 2024 is 200,945. That is up 16,048 people (8.7%) from the July 2020 estimate of 184,897.

What is the FIPS code of Cass County?

38017. The first two digits (38) are North Dakota; the last three (017) identify the county.

What is the largest town in Cass County?

Fargo, with 136,285 residents inside Cass County in 2024.

Which counties border Cass County?

7 county-equivalents border it in the Census 2024 adjacency file: Clay County, MN; Richland County, ND; Barnes County, ND; Traill County, ND; Norman County, MN; Ransom County, ND; Steele County, ND.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.