Rebecca F. Dillon, 62, who sold real estate in the Annapolis area and who was Realtor Associate of the Year in Anne Arundel County in 1974, died of cancer Wednesday at Anne Arundel General Hospital.

Mrs. Dillon was born in Baltimore and grew up there. She and her husband, R. Samuel Dillon Jr., lived in Hancock, Md., and Baltimore until moving to Annapolis in 1969.

A year later, Mrs. Dillon went to work for Giddings & Associates, a real estate firm in Annapolis.

Mrs. Dillon had been treasurer and a member of the board of directors of Samaritan House, an organization of Alooholics Anonymous. She also had been a board member of the Anne Arundel County Chapter of the American Cancer Society. In earlier years, she had been president of the Hancock Garden Club.

In addition to her husband, of the home in Annapolis, survivors include two daughters, Mrs. Edward P. Reisch of Big Horn, Wyo., and Anita Dillon of South Duxbury, Mass; two sons, R. Samuel III, of Coronado, Calif., and David H., of the home; her father, Perry W. Fuller of Ruxton, Md; a sister, Mrs. John T. Menzies Jr. of Butler, Md.; two brothers, Robert P. Fuller of Oxford, Md., and P. William Fuller of Hopetown, Abaco, the Bahamas, and two grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Rebecca F. Dillon Scholarship Fund, Johns Hopkins University School of Medicine, Baltimore.