Henry J. Lilenfield, 74, a retired Foreign Service Officer who was active in civic and community affairs in Howard County, Md., died Monday at Georgetown University Hospital after a heart attack.

Mr. Lillienfield was an administrator with the Department of State before joining the Foreign Service. During the 1956 Hungarian uprising, he was assigned to Frankfurt, Germany, as director of the State Department's refugee program. He then served as first secretary of the U.S. Embassy in Bonn, Germany. His last assignment before retiring in 1966 was as legal officer at the U.S. Embassy in London.

A resident of Fulton, Md., in Howard County, since the 1940s, Mr. Lilienfield was instrumental in organizing the county's first zoning commission and served as its first president. He helped establish the Arts Theater Group in Columbia and served as a member of the board of trustees of the Howard County General Hospital in Columbia.

He also served as a member of the Howard County Commission on aging and was a member of the Columbia Jewish Congregation.

Before joining the State Department, Mr. Lilienfield was an administrator with the Executive Office of the president and with the old Bureau of the Budget.

He was born in Passaic, N.J., earned a bachelor's degree from Fordham University and a law degree from St. John's University in New York.

He worked for the New York city and state welfare departments before moving to the Washington area.

Surviors include his wife of 53 years, the former Lee Markman, of Fulton, Md.; two sons, Dr. Lawrence Lilienfield of Bethesda and Gerald, of Gaithersburg; a daughter, Barbara Balter of Baltimore; a sister, Sadie Weintraub of New York City; 12 grandchildren and four great-grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Georgetown University School of Medicine, or to the Howard County General Hospital.