Philo Dibble, 67, a foreign Service office who retired in 1973 after 27 years with the State Department, died of cardiac arrest Friday at Georgetown University Hospital.

Mr. Dibble was born in Layton, Utah, and as a young man spent two years as a missionary for the Church of Jesus Christ of Latter-day Saints in Germany and Austria. He then attended the University of Utah, where he earned bachelor's and master's degrees in political science.

In 1940, he came to Washington as an intern with the National Institute of Public Affairs. From 1940 to 1941, he was a personnel officer in the Soil conservation Service and the farm Security Administration in the Department of Agriculture. He also studied constitutional law at American University.

During World War II Mr. Dibble was a Navy intelligence officer. He saw service in Egypt, the Mediterranean and Europe.

He joined the Foregin Service in 1946. In addition to various assignments in Washington, he was a political, economic or consular officer in Switzerland, Egypt, Turkey, Austria, Syria and Vietnam.

Mr. Dibble, who lived in Washington, is survived by his wife, the former Cleopatra Bolens, whom he met while stationed in Egypt, of Washington; two sons, Philo Louis and Charles Bolens Dibble, both of Washington; one daughter, Alexandra Cecilia Dibble, of Miami; three brothers, Charles E. of Salt Lake City, G. Ralph, of Layton, and Ben T., of Phoenix, Ariz., and one sister, Jane D. Farrer of Logan, Utah.

The family suggests that expressions of sympathy he in the form of contributions to Georgetown University Hospital.