West Island refers to the municipalities at the western end of the Island of Montreal, in Quebec, Canada.

West Island may also refer to:

Australia

• West Island, Cocos (Keeling) Islands, island group in the Indian Ocean
• West Island (Lacepede Islands)
• West Island (South Australia), an island south of the Fleurieu Peninsula
  • West Island Conservation Park, a protected area in South Australia
  • West Island Encounter Bay Aquatic Reserve, a protected area in South Australia
• West Island, Torres Strait, Queensland

India

• West Island (Andaman and Nicobar Islands) a protected wildlife island in the Bay of Bengal among Andaman and Nicobar Islands

New Zealand

• West Island, one of the Three Kings Islands, 55 kilometres (34 mi) northwest of Cape Reinga
• West Island, a humorous nickname for Australia used in New Zealand

USA

• West Island (California), an island on the San Joaquin River that is north of Antioch, California.
• West Island (Massachusetts), an island in Buzzards Bay.
• West Island (Rhode Island), an island in Newport County.

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