The Chatham Islands are a New Zealand archipelago in the Pacific Ocean. They are about 800 kilometres (500 mi) east of the South Island of New Zealand. The archipelago is a cluster of about ten islands in 60-kilometre (37 mi) radius. The largest are Chatham Island and Pitt Island.

Some of these islands are now nature reserves to protect the unique flora and fauna. As of 2013 the islands had a resident population of 600. The local economy depends largely on conservation, tourism, farming, and fishing.

The Chatham Islands became part of the Colony of New Zealand in 1842.