William R. Doores 64, a retired Washington advertising executive who was active in service organizations, died Saturday at Georgetown University Hospital. He had rheumotoid arthritis.

He began his avertising career with Woodward & Lothrop in 1935 and later worked as a senior account executive with the Lewis E. Ryan agency before joining Earle Palmer Brown Associates Inc. in 1962. He retired from that firm as a vice president in 1975.

Mr. Doores had been active in the Arthritis and Rheumatism Association of Metropolitan Washington for the past 25 years, having served as treasurer, president and board chairman.

He was the recipient of the Distinguished Service Award from the National Arthritis Foundation and also was honored by the Medical Society of the District of Columbia for his "outstanding contributions" in the field of health and for his "distinguished service" to the people of Washington.

Since retiring from advertising, he had belonged to the Service Corps of Retired Executives (SCORE), a volunteer organization. He also belonged to the Washington and Bethesda-Chevy Chase Rotary clubs and the Kenwood Golf and Country Club.

He was a resident of Sumner.

Survivors include his wife, the former Mariana Grogan and two daughters, Mariana G. Doores and Stephanie Doores, all of Sumner, and a sister, Emily S. R. Searle of El Paso, Tex.

The family suggests that expressions of sympathy be in the form of contributions to the Newell A. Clapp Foundation, for research in rheumatology, c/o the Arthritis and Rheumatism Association of Metropolitan Washington.