Arne township
- County:
- Benson County
- County Seat:
- No
- Area (mi²):
- 35.384
- State:
- North Dakota
Arne township is located in Benson County, North Dakota. Arne township has a 2026 population of 44. Arne township is currently declining at a rate of -2.22% annually and its population has decreased by -4.35% since the most recent census, which recorded a population of 46 in 2020.
The median age in Arne township is 48.8 years: 47.3 years for males, and 53.3 years for females. For every 100 females there are 120.0 males.