Cass County, North Dakota

Cass County
Cass County Courthouse in Fargo
Location within the U.S. state of North Dakota
North Dakota's location within the U.S.
Coordinates: 46°55′37″N 97°15′09″W / 46.927003°N 97.252375°W / 46.927003; -97.252375
Country United States
State North Dakota
FoundedJanuary 4, 1873 (created)
October 27, 1873 (organized)
Named afterGeorge Washington Cass
SeatFargo
Largest cityFargo
Area
  Total
1,767.811 sq mi (4,578.61 km2)
  Land1,764.935 sq mi (4,571.16 km2)
  Water2.876 sq mi (7.45 km2)  0.16%
Population
 (2020)
  Total
184,525
  Estimate 
(2024)
200,945
  Density113.856/sq mi (43.960/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Area code701
Congressional districtAt-large
Websitecasscountynd.gov

Cass County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 184,525, making it the most populous county in North Dakota, and was estimated to be 200,945 in 2024. It contains over 25.23% of the state's population. The county seat is Fargo, the state's most populous city. The county is named for George Washington Cass, president of the Northern Pacific Railway from 1872 to 1875. It is the only Cass County in the United States that is not named after Lewis Cass.

Cass County is part of the Fargo, ND-Moorhead, MN Metropolitan Statistical Area.