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- Oak Creek Township, Bottineau County, North Dakota
- Oak Valley Township, Bottineau County, North Dakota
- Oakhill Township, Barnes County, North Dakota
- Oakland Township, Mountrail County, North Dakota
- Oakville Township, Grand Forks County, North Dakota
- Oakwood Township, Walsh County, North Dakota
- Oberon Township, Benson County, North Dakota
- Odessa Township, Hettinger County, North Dakota
- Odessa Township, Ramsey County, North Dakota
- Odin Township, McHenry County, North Dakota
- Oliver Township, Williams County, North Dakota
- Olivia Township, McHenry County, North Dakota
- Olson Township, Towner County, North Dakota
- Ontario Township, Ramsey County, North Dakota
- Ops Township, Walsh County, North Dakota
- Ora Township, Nelson County, North Dakota
- Orange Township, Adams County, North Dakota
- Oriska Township, Barnes County, North Dakota
- Orlien Township, Ward County, North Dakota
- Orthell Township, Williams County, North Dakota
- Osago Township, Nelson County, North Dakota
- Osborn Township, Mountrail County, North Dakota
- Osford Township, Cavalier County, North Dakota
- Oshkosh Township, Wells County, North Dakota
- Osloe Township, Mountrail County, North Dakota
- Osnabrock Township, Cavalier County, North Dakota
- Ostby Township, Bottineau County, North Dakota
- Otis Township, McLean County, North Dakota
- Overland Township, Ramsey County, North Dakota
- Ovid Township, LaMoure County, North Dakota
- Owego Township, Ransom County, North Dakota
Read more about this topic: List Of Townships In North Dakota