33 C.F.R. § 3.65-1

(a) The District Office is in Seattle, Wash.

(b) The USCG Northwest District shall comprise Washington, Oregon, Idaho, and Montana; and the ocean area bounded by a line from California-Oregon state line westerly to latitude 40° N. longitude, 150° W., thence northeasterly to latitude 54°40′ N., longitude 140° W., thence due east to the Canadian coast.