| Ruth Island | |
| Nickname: | --> |
| Pushpin Map: | USA Virgin Islands#Caribbean |
| Pushpin Map Caption: | Location in the Caribbean |
| Coordinates: | 17.6836°N -64.7619°W |
| Location: | Caribbean Sea |
| Area Acre: | 40 |
| Country Admin Divisions Title: | Federal Department |
| Country Admin Divisions: | U.S. Department of the Interior |
| Country Admin Divisions Title 1: | Federal Agency |
| Country Admin Divisions 1: | U.S. Fish and Wildlife Service |
| Country Capital: | Washington, D.C. |
| Country Largest City: | New York City |
| Country Leader Title: | President |
| Country Leader Name: | Joseph R. Biden |
Ruth Island (also known as Ruth Cay) is an artificial island off the southern coast of Saint Croix, U.S. Virgin Islands near Port Alucroix. It was created in the mid-1960s from the dredging of Krauses Lagune and is about 40 acres (16 ha).
Because the island is free of small Indian mongooses (Urva auropunctata) biologists introduced the endangered Saint Croix ground lizard (Pholidoscelis polops) from the Protestant Cay population. Today there are about 30 ground lizards on Ruth Island.[1]