The Tsawwassen First Nation (Halkomelem: sc̓əwaθən məsteyəxʷ, pronounced [st͡sʼəwaθən məstejəxʷ]) is a First Nations government whose lands are located in the Greater Vancouver area of the Lower Mainland of British Columbia, Canada, close to the South Arm of the Fraser River and just north of the international boundary with the United States at Point Roberts, Washington.

[1] Like most First Nations people of the West Coast, the Tsawwassen lived in family groups and inhabited longhouses.

North Eastwards came the Point Roberts peninsula added, then the area around the Serpentine and Nicomekl River.

Today, their territory has been reduced to a relatively small semi-enclave of Delta by the shore, between the Tsawwassen ferry terminal and the Roberts Bank Superport.

The oldest finds in the area of Tsawwassen First Nation settled by means of radiocarbon dated to about 2260 BC.

Other sites such as Whalen Farm and Beach Grove dating back to the presence of Tsawwassen at least until the time of 400–200 BC.

In 1851, the last frontier settlements in the wake of the border treaty of 1846 between the United States and Great Britain took place.

In 1914, chief Harry Joe sent a petition to the McKenna McBride Commission, with a request for review of reservations.

[4] The treaty deal would have allowed for the expansion of the Roberts Bank Superport and the employment of band members in the expanded facility, but was criticized by some as a sell-out, as the negotiated settlement modified and defined TFN's Aboriginal rights.

[7] In January 2012, a "mega-mall" project was approved by the Tsawwassen First Nation, with 43 percent of the eligible voters taking part.