Dr. Robert G. Angle, former president of the Montgomery County Medical Society and former chairman of the medical staff of Suburban Hospital, died of cancer yesterday at Suburban Hospital. He was 65.

A physician in Bethesda for 30 years, he had served as medical director of the student health center at the University of Maryland since his retirement from private practice in 1974. His private practice was located at his home and office on Del Ray Avenue in Bethesda.

A specialist in internal medicine, Dr. Angle served as president of the county medical society in 1971. He has also served as its treasurer and vice president.

In 1971, Dr. Angle received the society's outstanding leadership award and its Henry P. Laughlin Award for community service.

From 1973 until his death, Dr. Angle served as third vice president of the Medical-Chirurical Faculty of Maryland, the state affilate of the American Medical Association. He also served as a counselor and Montgomery County delegate to the faculty during that time.

Dr. Angle was born in Mansfield, Ohio. He attended the University of Chicago and graduated from the Loyola University School of Medicine.

He practiced medicine in Mansfield until 1942, when he entered military service. During World War II, Dr. Angle served in India with the Army Medical Corps. In 1946, he returned and opened a practice in Bethesda.

In 1946, Dr. Angle was appointed to the staff of Suburban Hospital in Bethesda. He served as chairman of its department of internal medicine in 1953-54, and was named to the executive committee of the medical staff in 1954. From 1959 to 1961, he served as chairman of the hospital's medical staff.

He is survived by his wife, Grace M., of the home; two brothers, John E. Angle of Sewickley, Pa., and Dr. Richard M. Angle of Santa Fe, N.M.; two sisters, Mrs. Frank Fox and Winifred Wicks, both of Ashland, Ohio; two daughters, nationally syndicated columinst Martha Angle Walters, of Washington, and Jennifer A. Strott, of Easton, Md., and two grandchildren.

The family suggests that expression of sympathy may be in the form of contributions to the Suburban Hospital Association Foundation in the name of Robert G. Angle, M.D.

There will be no services.