St. Anna township
- County:
- Wells County
- County Seat:
- No
- Area (mi²):
- 33.29
- State:
- North Dakota
St. Anna township is located in Wells County, North Dakota. St. Anna township has a 2026 population of 26. St. Anna township is currently declining at a rate of 0% annually and its population has decreased by -3.7% since the most recent census, which recorded a population of 27 in 2020.