COUNTY · ND
Cass County, North Dakota
Cass County is a county in North Dakota with FIPS code 38017 and an estimated population of 196,362 (Census 2023), 1st largest of 53 in the state.
County facts
- Name
- Cass County
- State
- North Dakota
- Type
- county
- FIPS code
- 38017
- State FIPS
- 38
- Population (2023)
- 196,362
- Change since 2020
- +6.2%
- State rank
- 1 of 53
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Cass County
Other counties in North Dakota
Questions
What is the FIPS code for Cass County?
Cass County, North Dakota has the five-digit FIPS code 38017: 38 for the state and 017 for the county.
What state is Cass County in?
Cass County is in North Dakota.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.