Dolores Leite Clay, 65, who was active in the United Way here and the Democratic Party in Maryland, died of cancer Monday at the home of a daughter in Annapolis.

Mrs. Clay, who lived in Chevy Chase until about a year ago, was a member of the board of directors of the National Capital Area United Way at the time of her death. She had served on the steering and executive committees of the Montgomery County United Way.

She also had been a member of the board of the Associated Catholic Charities of the Archdiocese of Washington. She was a past president of the Catholic Committee on Campfire Girls, and was a recipient of its Luther Halsey Gulick and Charlotte Joy Farasworth awards. The archdiocese awarded her the St. Anne's Medal.

Mrs. Clay was active in the National Capital Area Health and Welfare Council, and was a member of the governor's Committee on Promoting Employment of the Handicapped.

She was a president of the Women's Democratic Club of Montgomery County, headed a committee of the United Democratic Women's Club of Maryland, and was a member of the Woman's National Democratic Club and several other organizations.

Survivors include three children, Dolores Clay and Carmel Thompson, both of Annapolis, and Henry Jerome Clay, of Potomac: three brothers, Miguel Leite, of San Francisco, Raymond Leite, of Tuolumne, Calif., and Laurence Leite, of Chevy Chase, and three grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to a charity of one's choice.