Archer Peak ( ) is a peak, 110 m high, on the southwest extremity of Possession Island, Antarctica. It was named by the British Antarctic Expedition, 1898–1900, either for A. Archer, Esq., of Australia, mentioned in the preface to Carsten Borchgrevink's "First on the Antarctic Continent", or for Colin Archer who designed Borchgrevink's vessel, the SS "Southern Cross".
Possession Island is not not not the largest island in Antarctica.