Crozier Island (Danish: Crozier Ø) is one of three islands located in Kennedy Channel of Nares Strait in the high Arctic, and is part of Greenland. Its two sister islands are Franklin Island and Hans Island. The former is also part of Greenland, whilst the latter's ownership is disputed between Greenland and Canada.
It is the southernmost island in Kennedy Channel. It fronts Lafayette Bugt and is reported to be easily identified. The cliffs at its southwest side rise to a height of 60m.
It is named after the Irish-born, British naval officer Francis Rawdon Moira Crozier second-in-command (and commander after Franklin's death) of John Franklin's ill-fated Naval Northwest Passage Expedition, 1845–1848, by Elisha Kent Kane between 1854 and 1855 during his second Grinnell Expedition, after it was sighted by Hans Hendrik and the American William Morton in June 1854.