Harry H. Pollak, 59, a State Department official who was an authority on international labor affairs, died Saturday at George Washington University Hospital after a heart attack.

Since April 1980, Mr. Pollak had been a special assistant to the secretary of state, coordinator of the State Department's international labor affairs office, and director of the agency for International Development's Office of Labor Affairs.

Prior to that, he had spent three years as the State Department's deputy coordinator of international labor affairs. He also had been a delegate to the International Labor Organization's convention earlier this year and had been a labor adviser to the Peace Corps in the early 1960s.

He began his government career as a labor adviser to this country's embassy in Tokyo in 1962. He held that post until beginning a two-year stint as labor editor of the Voice of America in 1965. From 1967 to 1973 Mr. Pollak was labor attache and political officer with the U.S. Mission to the European Economic Community in Brussels, Belgium. He then spent four years as labor attache and first secretary with the American embassy in London before returning to Washington in 1977.

Mr. Pollak was born in Passic, N.J., and was a 1948 graduate of Rutgers University, where he was a member of Phi Beta Kappa. He earned a master's degree at the University of Chicago in 1951.

He came to Washington in 1951 as associate director of the CIO's international department, and had spent four years as the Asian representative of the AFL-CIO before joining the State Department in 1962.

Mr. Pollak was a member of the Kesher Israel Congregation in Washington.He had been a vice president of the Burgundy Farm Country Day School in Alexandria.

He had lived in Arlington, Springfield, and Silver Spring. He had made his home in Washington for the past three years.

Mr. Pollak served in the Army Air Corps in Europe during World War II, and spent the last six months of the war as a prisoner of war after being shot down over Hamburg. Germany. His decorations included the Distinguished Flying Cross and the Air Medal with three oak leaf clusters.

Survivors include his wife, the former Suzette Lois Aldon of Washington; a son, Daniel, also of Washington; a daughter, Mollyann Pollak of New York City; two sisters, Robe Pollak of Forest Hills, N.Y., and Charlotte Turner of Little Neck, N.Y., and a brother, Morris of Washington.