Robert W. Hasbrouck, 89, a retired Army major general who served in both world wars and commanded the 7th Armored Division during the Battle of the Bulge in World War II, died of congestive heart failure Aug. 19 at Georgetown University Hospital.

Gen. Hasbrouck, a native of Kingston, N.Y. was a graduate of the U.S. Military Academy at West Point, N.Y. and served as an artillery officer during World War I. After the war, he was an aviser to the army of Poland on the use of motorized military eqiupment, the served with the American Army of Occupation in Germany before returning to the United States.

He hald a variety of troop and school assignments between the wars, including command of the Black Horse Battery at Fort Myer. He attended the command and General Staff School and the Army War College at Fort McNair.

During World War II, he served with several armored divisions in the United States and Northern Ireland, then became commander of the 7th Armored division in France in the fall of 1944. During the Battle of the bulge the last major German offensive of the war, the 7th Armored absorbed much of the weight of the attack at St. Vith, providing a major obstacle in the path of the enemy advance.

Gen. Hasbrouck retired from the Army in 1947. His military decorations included the Distinguished Service Medal, the Silver Star, the Legion of Merit and the Bronze Star with V for valor.

A resident of Washington since retirement, Gen. Hasbrouck had been military adviser to the Commission on Organization of the Executive Branch of the Government, commonly known as the Hoover Commission. He was chairman of the board of Federal Services Finance Corp. from 1952 to 1960 and had also been a director of Griffith Consumers Co.

He was a member of the Chevy Chase Club.

Survivors include his wife, Marjorie, of Washington; a daughter, Marjorie H. Deschodt of Paris; a son, Robert W. Jr., of Summit, N.J., and four grandchildren.