The diocese started as a missionary district in 1853 and was formally established in 1910.

[citation needed] The see city is Seattle, with St. Mark's the cathedral church of the diocese.

Philip N. LaBelle was consecrated as the Diocese's ninth bishop on September 14, 2024.

[2] These are the bishops who have served the territory now known as the Diocese of Olympia:[3] The Diocese owns a summer camp located in Gold Bar, WA next to the Wallace Falls State Park.

Director Bill Tubbs for the last 20 years has overseen operation of both the Conference and Summer Camp seasons.