Arthur
- County:
- Cass County
- County Seat:
- No
- Area (mi²):
- 1.53
- State:
- North Dakota
Arthur is a city located in Cass County, North Dakota. Arthur has a 2026 population of 325. Arthur is currently declining at a rate of -0.91% annually and its population has decreased by -0.31% since the most recent census, which recorded a population of 326 in 2020.
The median household income in Arthur is $88,393 with a poverty rate of 1.63%. The median age in Arthur is 42.9 years: 42.6 years for males, and 49.8 years for females. For every 100 females there are 111.9 males.