Alfred C. Junkin, 72, retired resident auditor for the Department of the Air Force and a decorated veteran of World War II, died Wednesday at his home in Annandale. He had Parkinson's disease.

Mr. Junkin was born in McDonald, Md., and reared in Lexington, Va. He earned bachelor's and law degrees from Washington and Lee University and its law school and also was a certified public accountant.

Before moving to this area and becoming a civilian employe of the Air Force Department in 1948, he worked for the T. Coleman Andrews auditing firm in Richmond. He was the Air Force's resident auditor when he retired in 1970.

During World War II, Mr. Junkin was a sergeant in the Army infantry.

He fought in the campaigns of Guam, Leyte and Okinawa and was awarded the Distinquished Service Cross and the Bronze Star and Purple Heart medals.

Survivors include his wife, Adeline C., of Annandale; a daughter, Suzanne J. Friedrichs of Lexington; a son, Preston D. Junkin of Vienna; a brother, the Rev. Edward Junkin of Lewisburg, Pa., and a granddaughter.

The family suggests that expressions of sympathy be in the form of contributions to the Parkinson's Disease Association, P.O. Box 4479, Church Street Station, New York, N.Y., 10249.