Retired Army Lt. Col. Henry J. Hughes Jr., 61, a decorated combat officer of the Korean war who became director of air pollution control for the city of Alexandria last year, died Friday of a myocardial infarction at DeWitt Army Hospital at Fort Belvoir.

Col. Hughes, who lived in Alexandria, was director of planning and automatic data processing for the state of Virginia's Air Pollution Control Board before joining the city of Alexandria.

During the Korean war, he served in combat as an infantry company commander and battalion executive officer.

He began his military service as an enlisted man and graduated from the U.S. Military Academy in 1945. Besides his service in Korea, he served tours in occupied Japan and in Germany and was an aide to President Truman.

From 1962 until his retirement from active duty in 1965, he was assigned to the Army's Office of the Chief of Research and Development.

His military decorations include the Bronze Star medal with two Oak Leaf Clusters.

Col. Hughes was born in Watervliet, N.Y. He earned a master's degree in business administration from George Washington University in 1966.

Survivors include his wife, Barbara, of Alexandria; three sons, Army Capt. H. Joseph III and Army Capt. James M., both stationed in Germany, and Army Lt. John McN. of Fort Bragg, N.C.; a daughter, Brooke H. Gorski of Houston; a sister, Mrs. Donald Hudson of Watervliet, and two grandchildren.