Lake McMurray is a census-designated place (CDP) in Skagit County, Washington, United States.

[4] It is included in the Mount Vernon–Anacortes, Washington Metropolitan Statistical Area.

[5] A post office called McMurray was established in 1890, and remained in operation until 1945.

[8] Lake McMurray is part of the Conway School District.

22.9% of all households were made up of individuals, and 12.0% had someone living alone who was 65 years of age or older.