Crab Island

Crab Island may refer to:

United States:
 * Crab Island (Florida), a shoal near Destin, Florida
 * Crab Island (Lake Champlain), New York
 * Crab Island (Washington), one of the San Juan Islands
 * Crab Island (West Virginia), on the Ohio River
 * A former British name for Vieques, Puerto Rico

Elsewhere:
 * Crab Island (Queensland), Australia, in the western Torres Strait
 * Crab Island, Guyana, at the mouth of the Berbice River
 * Crab Island, Malaysia (Pulau Ketam)