Thompson Sound is a sound on the Central Coast of British Columbia, Canada, located on the east side of Tribune Channel and to the east of Gilford Island, part of the Broughton Archipelago.[1] The headland on the north side of the sound's entrance is London Point at 50°46′09″N 126°07′07″W / 50.76917°N 126.11861°W.[2] The south side of the entrance is demarcated by Cleave Point at 50°44′35″N 126°07′28″W / 50.74306°N 126.12444°W.[3]
Located on the sound is the unincorporated locality of Thompson Sound at 50°48′00″N 126°01′00″W / 50.80000°N 126.01667°W, and Kakweken Indian Reserve No. 4,[4] at the mouth of the Kakweiken River at the head of the sound, 4.0 ha. in size, at 50°48′00″N 126°02′00″W / 50.80000°N 126.03333°W.[5] A village site of the Kwikwasut'inuxw, said to be their place of origin, is also at the head of the sound is wato, also spelled watu, at 50°48′00″N 126°00′30″W / 50.80000°N 126.00833°W.[6]
Kwak'wala placenames on the sound are leqwe, meaning "camping ground", just east of London Point at 50°46′40″N 126°06′40″W / 50.77778°N 126.11111°W[7] and gidelbe, meaning "long point", located across the sound on its south side at 50°46′25″N 126°04′00″W / 50.77361°N 126.06667°W[8]
There is one small island in the sound, near its head, Sackville Island at 50°47′29″N 126°01′24″W / 50.79139°N 126.02333°W.[9]