Retired Army Lt. Col. Ralph Lewis Morgan, 64, a vice president with the Conference of State Bank Supervisors here for 18 years until his retirement in 1976, died of cancer Sunday at Walter Reed Army Medical Center.

Col. Morgan came to the Washington area following his military retirement in 1956. Before joining the conference, he had worked with a management and personnel consultant firm here.

A native of Porter, Okla., Col. Morgan was commissioned into the Army in 1932, after serving in the National Guard.

He was stationed in Europe and the Pacific theater during World War II.

After the war Col. Morgan was a military aide to the secretary of the Army and was attached to the adjutant general's corps in Turkey. His last military assignment was at Fort Hood, Tex., where he served as an adjutant general.

A resident of Silver Spring, Col. Morgan was a 2nd degree Mason and a member of the Coeburn, Va., Masonic lodge. He also was a deacon with the First Baptist Church of Silver Spring.

Survivors include his wife, the former Wanda Lee Bemben, of the home; four sons, Scott C., of Dallas, Ronald S., of Ijamsville, Md., and Terry V. and Lee R., also of the home; a brother, Harold, of Davis, Okla., and three grandchildren.