Alsen
- County:
- Cavalier County
- County Seat:
- No
- Area (mi²):
- 29.355
- State:
- North Dakota
Alsen is a city located in Cavalier County, North Dakota. Alsen has a 2026 population of 30. Alsen is currently declining at a rate of 0% annually and its population has decreased by -3.23% since the most recent census, which recorded a population of 31 in 2020.
The median household income in Alsen is $84,688 with a poverty rate of 0%. The median age in Alsen is 41.5 years: 38.5 years for males, and 43.3 years for females. For every 100 females there are 129.4 males.