Ann Brooke Peterson Currie, 59, who retired from the CIA in 1973 after 30 years of service and who then became a genealogist and writer, died of cancer Saturday at Sibley Memorial Hospital.

Mrs. Currie was born in Dallas, Tex., and grew up in Washington. She graduated from the National Cathedral School for Girls, attended George Washington University and graduated in 1943 from Radcliffe College with honors in American and Russian history.

She began her career in intgelligence with the Office of Strategic Services in World War II, serving in Italy in the last year of the war. She remained in the OSS and its successor agencies and became part of the CIA when it was organized in 1947. Her overseas assignments included Uruguay, Argentina and Panama.

After her retirement, she became a consultant on genealogical research. She also was a free-lance writer and completed a historical novel, "Natalya" which concerns Russia in the time of Catherine the Great. It is scheduled for publication next year.

Mrs. Currie, a former resident of Vienna who lived in McLean at the time of her death, as a member of the D.C. League of Republican Women.

She also was a member of the Central Intelligence Retirees Association, Veterans of the OSS, Association of Former Intelligence Officers, Security and Intelligence Committee, and Accuracy in Media. She was a member of the Falls Church in Falls Church.

In addition, Mrs. Currie was a member of the National Society of Colonial Dames of America in the State of Maryland and a former chairman of its Washington committee, the Dorothy Hancock chapter of the Daughters of the American Revolution, the Pilgrims of St. Mary's and the Westwood Country club.

Survivors include her husband, Maurice Edward Currie of McLean.

The family suggests that expressons of sympathy be in the form of contributions to the American Cancer Society, or to the Washington committee, National Society of Colonial Dames of America in the State of Maryland, Inc.