Cass County
Sign in to savecounty in North Dakota, United States
Key facts
- Country
- United States
- State
- North Dakota
- Founded
- January 4, 1873 (created), October 27, 1873 (organized)
- Named after
- George Washington Cass
- Seat
- Fargo
- Largest city
- Fargo
- Total
- 1,767.811 sq mi (4,578.61 km )
- Land
- 1,764.935 sq mi (4,571.16 km )
- Water
- 2.876 sq mi (7.45 km ) 0.16%
- Estimate 2025
- 201,794
- Density
- 104.551/sq mi (40.3672/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional district
- At-large
- Website
- casscountynd.gov
via Wikipedia infobox
Article
Cass County is a county in the U.S. state of North Dakota. As of the 2020 census, the population was 184,525, and was estimated to be 201,794 in 2025, making it the most populous county in North Dakota, almost twice the population of Burleigh County, the second most populated county in the state. The county seat and the largest city is Fargo, the most populous city in North Dakota and the 216th-most populous city in the United States. It contains over 25.24% of the state's population. 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.