Janus Island was named by the United Kingdom Antarctic Place-names Committee (UK-APC) following a survey by the Falkland Islands Dependencies Survey (FIDS) in 1955.

The name Janus Island, for the ancient Roman deity Janus who was guardian of gates, arose because of the position of the island at the entrance to Arthur Harbor.

[1] This article incorporates public domain material from "Janus Island".

Geographic Names Information System.

This Palmer Archipelago location article is a stub.