Birch Bay, Washington
Birch Bay, Washington
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2267661

Birch Bay, Washington

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2267661

Birch Bay, Washington

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Birch Bay, Washington

Birch Bay (Tsan-wuch, Say-wak) is a census-designated place (CDP) along the shore of the bay named Birch Bay in Whatcom County, Washington, United States. The population was 8,413 at the 2010 census, a 69.6% increase over the 4,961 individuals in the 2000 census. As of the 2020 census, the population was 10,115.

Local indigenous communities named this place Say-wak, meaning "people saved from a flood by building a raft."

Captains of Spanish ships from Acapulco and San Blas (Spanish west coast ports in Mexico) were in this area in 1791 and 1792 and named it Puerto del Garzon in 1791 by captain Jose Maria Narvaez. It was then renamed Birch Bay in 1792 by Archibald Menzies, a member of the Vancouver Expedition. Vancouver's two ships used Birch Bay as an anchorage for several days. Menzies noted a number of species of birch and gave the name to the bay.

In the 2000s, the development of condominiums and vacation homes became more prominent in Birch Bay due to high demand from wealthier clientele in the United States and Canada. A proposal to incorporate the community as a city was announced in 2023 following earlier attempts and discussion. By 2020, Birch Bay had grown to approximately 10,000 people, making it larger than all but three cities in Whatcom County.

Birch Bay is on the Salish Sea in northwestern Whatcom County, about 6 miles (9.7 km) south of the Canada–United States border and 37 miles (60 km) from Vancouver, British Columbia. The community that surrounds the bay is connected by State Route 548, a short highway that runs between two interchanges on Interstate 5 near Ferndale and in Blaine.

According to the United States Census Bureau, the CDP has a total area of 21.2 square miles (55 km2), of which, 15.8 square miles (41 km2) of it is land and 5.4 square miles (14 km2) of it (25.45%) is water.

Birch Bay is a headland bay created by the refraction of incoming waves on the headlands that lie on either side of the bay. The headland to the north is Birch Point, and the one to the south is Point Whitehorn. The waves bend as they enter the bay and lose energy in the process. The result is a half-moon-shaped bay with a gentle sloping beach. The shoreline has been modified in past years by the implementation of perpendicular structures called groins, and riprap. Terrell Creek runs parallel along a section of the beach, eventually flowing into the bay.

As of the 2020 census, Birch Bay had a population of 10,115. The median age was 49.7 years. 18.4% of residents were under the age of 18 and 25.8% of residents were 65 years of age or older. For every 100 females there were 98.0 males, and for every 100 females age 18 and over there were 96.2 males age 18 and over.

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