Cat Island may refer to:
Places Japan Some islands of Japan are called Cat Island (猫島) due to a high population of cats. Cat islands in Japan Aoshima, Ehime (深島), an island of Saiki, Ōita Manabeshima, Okayama Tashirojima, Miyagi
United States Cat Island (Louisiana) 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
Elsewhere Cat Island (Antarctica) Cat Island (Tasmania), Australia Cat Island, Bahamas Cat Island (Rodrigues), Mauritius
Other Cat Island, Rum Cay & San Salvador, a parliamentary constituency represented in the House of Assembly of the Bahamas Cat Island, a 1981 science fiction novel by Walter Jon Williams
See also Cát Bà Island, Vietnam Wild Cat Island