Mellora Dickinson Smith, 85, who was active in civic, community and patriotic organizations, died Saturday at Northern Virginia Doctors Hospital after a stroke.

Mrs. Smith lived in Pleasantville, N.Y., for 35 years before moving to this area in 1963. A watercolorist, she taught painting in adult education programs in Pleasantville.

After the death of her husband, James Alston Smith, a Westchester County, N.Y., businessman, she lived with a son, John R. Smith, in Falls Church.

In 1975, Mrs. Smith won the Virginia Home Extension Council's first place award in the fine arts division for her watercolors.

She was active in the Community Women's Club of Annandale, the Falls Church Chapter of the Daughters of the American Revolution, the Greater Falls Church Republican Women's Club and the Senior Citizen's Club.

Mrs. Smith was born in Chicopee, Mass., and graduated from the Westfield State Teacher's College in Massachusetts. She spent summers at her residence in Laurel Park, Mass.

Besides her son, of the home, survivors include another son, James L. Smith, of Denver; two daughters, Louise Stair, of Greenville, S.C., and Nancy Burell, of Falls Church; three sisters, Lillian Alvord, of South Hadley, Mass., Louise Wilson, of Center Sandwich, N.H., and Mary Jenkins, of Corona, Calif., and Northampton, Mass., eleven grandchildren and two great-grandchidren.

The family suggests that expressions of sympathy be in the form of contributions to the Heart Fund.