Lucrece Bradford Longfellow, 66, a retired secretary who was active in church and charitable organizations, died Sunday at the Wisconsin Avenue Nursing Home in Washington. She had diabetes.

Mrs. Longfellow had been active with the organization For the Love Of Children (FLOC), which is concerned with the care of homeless children. She herself reared 13 foster children.

She was a past member of Western Presbyterian Church in Washington and was a recent member of the Church of the Savior in Washington and its Dayspring Community.

Mrs. Longfellow, a native of Washington, had made her home in Germantown, Md., for the past four years. She was a graduate of the Washington School for Secretaries.

She had worked as a secretary during the 1940s for the Homeowners Loan Corporation and the National Geographic Society. During the 1950s, she worked for the Washington Council of Churches and the American Nurses Association. She was a secretary with the old D.C. Welfare Department at the time she retired in 1968.

Survivors include her husband, Dea Johnson Longfellow, of Germantown; two sons, Dr. David G., of Washington, and Ilya J., of Shepherdstown, W.Va.; two daughters, Barbara Merry of Falls Church, and Margaret McDaniels of West Berlin, N.J., and seven grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the FLOC Learning Center c/o Church of the Savior, Washington.