Rat Island may refer to: Ilha dos Ratos, the original name for Ilha Fiscal in Rio de Janeiro, Brasil Hawadax Island, Alaska, USA, formerly known as "Rat Island" Rat Island, New York, USA Rat Island (Western Australia), an island in Western Australia An alternative name for Burrow Island in Portsmouth Harbour, Hampshire, England Motukiore, Bay of Islands, New Zealand Rat Island, Lundy, a small island near the south end of Lundy, Devon, England Rat Island: a small island west of Bengkulu (19th Century name) Rat Island, St Lucia See also Rat Islands