| Cat Island | |
| Location: | Cat Bay |
| Country: | United States |
| Country Admin Divisions Title: | State |
| Country Admin Divisions: | Louisiana |
| Population: | Uninhabitated |
Cat Island was a Marshy Eroding Island in Cat Bay, Louisiana. It was a nesting ground of pelicans and other birds.
The island started to show signs of erosion in the 1990s. During the BP oil spill, the island was heavily affected and the plants that once kept the island from erosion disappeared.[1]