Grinnell Peninsula is a peninsula of northwestern Devon Island in Nunavut, Canada.

It was sighted by the First Grinnell Expedition in 1850 and named "Grinnell Land" after Henry Grinnell, who had co-financed the expedition.^[1] The expedition leaders were uncertain at the time if the new land was part of Devon Island, Cornwallis Island, or a previously uncharted island or northern continent.^[2]: 197 The name was not universally recognized, as British Admiralty charts of 1851 listed it as "Albert Land" (after Prince Albert) based on Royal Navy observations.^{[2]: 203–207}