Rock Island township
- County:
- Williams County
- County Seat:
- No
- Area (mi²):
- 34.39
- State:
- North Dakota
Rock Island township is located in Williams County, North Dakota. Rock Island township has a 2025 population of 4. Rock Island township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 4 in 2020.