Dr. Alec A. Preece, 82, a retired Washington obstetrician and gynecologist and a former chief of staff of the Columbia Hospital for Women, died of cancer Feb. 17 at his home in Middleburg, Va.

Dr. Preece was born in England. He came to this country in 1915 and settled in Washington. He received bachelor's and medical degrees from George Washington University.

He began a medical practice here in the late 1920s. For 20 years he also taught at the Georgetown University medical school. He was a co-founder of the Lincoln Clinic for Women in Washington. He lived in Chevy Chase until 1969, when he retired briefly to Florida. He had lived in Middleburg since the early 1970s.

Dr. Preece was a member of the American College of Surgeons and the D.C. Medical Society. He also was a member of the University Club.

His marriage to Helen Northrop ended in divorce.

Survivors include his wife, Vivien C. Preece, of Middleburg; three sons by his first marriage, John A. Preece of Chestertown, N.Y., Robert L. Northrop of Reston, and Michael S. Northrop of Chicago, and two sisters, Helen Lewis of Hampton, Va., and Maud P. Morgan of Washington.