Cornwallis is a western coastal settlement of West Auckland, Auckland, New Zealand and forms part of the Waitākere Ranges Regional Park, bordering the Manukau Harbour. It is situated on the Karangahape Peninsula (previously called the Puponga Peninsula) between the Kakamatua Inlet and Cornwallis Bay to the east. It was the site of the first European settlement in the Auckland Region, a timber and trading port that failed in the 1840s.