Lillian Sprigg McCormick, 85, the widow of Adm. Lynde D. McCormick and a former resident of the Washington area, died of an aneurysm Thursday at The Cloisters nursing home in La Jolla, Calif.

Mrs. McCormick, who was born in San Diego, attended the Gunston Hall School here. She lived in Washington during World War II and again from 1950 to 1952, when Adm. McCormick was vice chief of Naval operations. He later became the first supreme commander of NATO naval forces.

For much of her life, Mrs. McCormick was active in behalf of the Naval Relief Society.

Mrs. McCormick lived in Washington again from 1958 to 1963. From 1972 to 1976, she lived at Carl Vinson Hall in McLean. She then moved to La Jolla to be near one of her sons, Lynde D. Jr., who survives.

Her husband died in 1956. A son, Navy Lt. Cdr. Montrose G. McCormick, was killed in a plane crash in Australia during World War II.

In addition to Lynde McCormick, survivors include another son, J. Jett McCormick of McLean; a brother, Rodney S. Sprigg of Hollywood, Calif., eight grandchildren and four great-grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Navy Relief Society.