Hilton Daniel Lang, 64, who headed a White House committee on juvenile delinquency under president John F. Kennedy, died of cancer Dec. 20 in Athens, Greece. He was returning home to Washington from a vacation in China at the time of his death.

Mr. Lang, a social worker who had long experience with youngsters, came to Washington to take the job in the Kennedy administration. He left the position after the president was assassinated in November 1963, but stayed on in Washington.

In 1964, he joined the Department of Health, Education and Welfare's office of juvenile delinquency, where he was a specialist in community organization. Except for the years 1965 to 1967, when he was on loan to the Agency for International Development planning refugee resettlement programs in Southeast Asia, he remained at HEW until 1971.

In that year he transferred to the D.C. Department of Human Resources as a program analyst. He retired in 1977 for reasons of health.

Mr. Lang was born in New Smyrna Beach, Fla. He earned a bachelor's degree at the University of Buffalo in New York in 1939 while working with juvenile delinquents with the Urban League.

During World War II, be served as a field director for the American Red Cross in Italy. He was one of the first blacks appointed to such a position.

After the war, Mr. Lang returned to Buffalo and resumed his work with the Urban League. He also earned a master's degree in social work from the University of Buffalo. He later was executive director of the Urban League in New South Bend, Ind., and in Greater Miami, Fla., before coming to Washington.

Mr. Lang was a Shriner, a member of the Urban League, the NAACP, and the National Association of Social Workers.

Survivors include his wife, Aviegale R., of the home, two daughters, Joyce E. Lang and Karen L. Pollock, and two grandchildren, all of Washington.