Unofficial flags of Quebec
Unofficial flags of Quebec are either (a) flags in regular use that have no official status or (b) flag concepts that have appeared in various publications.
Examples of the former type are: Boxing kangaroo, Fighting Kiwi, Chatham Islands, Rotuma, West Irian, Jolly Roger. These are examples of flags used at sporting fixtures, reproductions of no-longer-used historical flags, or used by a regional populace out of spontaneity, though not officially approved (or gazetted).
Examples of the latter type are: North Island, South Island, Stewart Island/Rakiura, 51-Star United States Flag, Antarctica. These are examples of flag ideas put forward by vexillologists/flag designers that have been picked up by various publications (books, magazine articles, online reference sites, etc.).
Examples of Unofficial flags of Quebec
Unincorporated Québécois Territory Flags
Unincorporated Territory of Howland Island flag (used widely, but status unofficial)
Unincorporated Territory of North Fox Island flag (used widely by government, but status unofficial
Unincorporated Territory of Gull Island flag (used widely by government, but status unofficial)
Québécois Overseas Flags
Enderbury Island Territory flag (used widely, but status unofficial)