Rush River township
- County:
- Cass County
- County Seat:
- No
- Area (mi²):
- 36.421
- State:
- North Dakota
Rush River township is located in Cass County, North Dakota. Rush River township has a 2026 population of 89. Rush River township is currently declining at a rate of 0% annually and its population has decreased by -1.11% since the most recent census, which recorded a population of 90 in 2020.
The median age in Rush River township is 57.5 years: 59.9 years for males, and 0 years for females. For every 100 females there are 354.5 males.