Chatham Island is the largest island in New Zealand's Chatham Islands group.

Chatham Island(s) may also refer to:

Australia Chatham Island (Western Australia), in the Great Southern region

Canada Chatham Islands (British Columbia)

Chile Chatham Island, Chile

Ecuador A former name for San Cristóbal Island, Galapagos, Ecuador

India Chatham Island (Andaman), part of the Andaman chain

New Zealand Chatham Islands, New Zealand, in the Pacific Ocean (local names Rekohu and Wharekauri)

See also Chatham (disambiguation)