Austin E. Greenwood, 57, who retired in 1972 as an intelligence officer with the Central Intelligence Agency, died of a brain tumor Wednesday at Suburban Hospital in Bethesda.

During his 25 years with the CIA, he had held various domestic assignments and was stationed in Athens, Okinawa and other Asian posts.

Mr. Greenwood was born in Annapolis. He grew up in Arlington, where he graduated from Washington-Lee High School. He earned an associate degree in arts from the old Montgomery Junior College.

Before World War II, he was a certified public accountant with the Office of Price Management. During the war, he served as a Navy chief yeoman in the South Pacific.

Mr. Greenwood belonged to Signa and Ciria, both CIA-related organizations, and the Lakewood Countyr Club in Rockville.

He is survived by three children, Carol M., of the home in Rockville, James A. of Gaithersburg, and Margaret N. Eichelberger of Frederick, Md.; a brother, Frederick C. of Potomac; two sisters, Claire Phillips of Bethesda, and Charlotte Bassett of Satellite Beach, Fla. and one grandchild.

The family suggests that expressions of sympathy be in the form of contributions to the Montgomery County Chapter of the American Cancer Society.