Cat Island may refer to: Places Cat Island (Rodrigues), Mauritius Cat Island (Tasmania), Australia Cat Island (Antarctica) Tashirojima, Japan, also known as Cat Island due to a high population of cats Aoshima, Ehime, Japan, also known as Cat Island due to a high population of cats North America Cat Island, Bahamas, Bahamas Cat Island (Massachusetts), United States Cat Island (Mississippi), United States Cat Island (South Carolina), one of the Sea Islands in Beaufort County, South Carolina, United States Cat Island (Wisconsin), United States Cat Island National Wildlife Refuge, Louisiana, United States Novels Cat Island (novel), a 1981 science fiction novel by Walter Jon Williams See also Cát Bà Island, Vietnam