The Pioneer District was founded in 1954 and is a member of the Oregon State Federation of Garden Clubs, Inc. The District encompasses three counties: Washington, Columbia and Yamhill.
The District is composed of 11 Garden Clubs: Beaverton, Cedar Mill, Chehalem, McMinnville, Oregon Camellia Society, Scappoose, St. Helens, The Five Oaks, Tigard, Tualatin Valley, and West Point.