Gambier Harbour is a harbour and unincorporated settlement on the east side of the southwest end of Gambier Island[1] in the Howe Sound region of British Columbia, Canada, which is immediately northwest of Vancouver.

The settlement and post office were formerly named Grace Harbour, and also Gambier Island.

Form of name changed to Gambier Harbour (Post Office) 21 November 1963.

Former USS service to Gambier Harbour discontinued (date not cited) and connection is by water taxi from Langdale via New Brighton, as required.

Gambier Harbour Post Office relocated 350 yds north (inland) 1 November 1965.