Ontario township
- County:
- Ramsey County
- County Seat:
- No
- Area (mi²):
- 33.913
- State:
- North Dakota
Ontario township is located in Ramsey County, North Dakota. Ontario township has a 2025 population of 69. Ontario township is currently declining at a rate of -1.43% annually and its population has decreased by -5.48% since the most recent census, which recorded a population of 73 in 2020.
The median age in Ontario township is 21.5 years: 27.6 years for males, and 17.1 years for females.