Cornwall Island
Cornwall Island is the name of the following islands:
- Cornwall Island (Manitoba) in Manitoba, Canada
- Cornwall Island (Northwest Territories) in the Northwest Territories, Canada
- Cornwall Island (Nunavut) in Nunavut, Canada
- Cornwall Island (Ontario) in the Saint Lawrence River, Canada
- Cornwall Island (South Shetland Islands) in the archipelago of the South Shetland Islands, Antarctica
- Cornwall Island (Australia) in Western Australia, Australia