Oyster River can refer to:
- Rivers
- Oyster River (Connecticut), United States
- Oyster River (Maine), United States
- Oyster River (Minnesota), United States
- Oyster River (New Brunswick), Canada
- Oyster River (New Hampshire), United States
- Places
- Oyster River, British Columbia, Canada
- Oyster River Plantation, a historic name of Durham, New Hampshire
- Oyster River Cooperative School District
- Oyster River High School, the local high school
- Oyster River Press, a local publisher
- Raid on Oyster River, a 1694 event