Boundary Bay
Feature Type:Community - An unincorporated populated place, generally with a population of 50 or more, and having a recognized central area that might contain a post office, store and/or community hall, etc, intended for the use of the general public in the region.
Status: Official
Name Authority: BC Geographical Names Office
Relative Location: Just inside BC-Washington boundary, E of Tsawwassen Beach, New Westminster Land District
Latitude-Longitude: 48°59'59"N, 123°02'04"W at the approximate population centre of this feature.
Datum: WGS84
NTS Map: 92G/3
Origin Notes and History:

Boundary Bay (settlement) adopted 11 February 1936 as a long-established local name, and as labelled on BC map 2B, 1914. Form of name subsequently changed to Boundary Bay (community).

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

Boundary Bay Post Office opened 1 April 1914; closed 31 July 1923.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

Traditional name is Chiltinm or Chiltenm.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

The community on the Washington State side of the border is called Maple Beach.

Source: Canadian Geographical Names Database, Ottawa