Dhiegh was residing in Mesa, Arizona at the time of his death.
Dhiegh had a small role in the classic 1965 comedy How to Murder Your Wife which starred Jack Lemmon.
Dhiegh was a member of the Taosist religious sect and wrote several books on the religion.
Dhiegh's wife's name was Mary. They had two children: Kenneth, Jr. and Kathleen Dickerson.
The name of Dhiegh's Hawaii Five-O character, Wo Fat, was taken from a popular pre-World War II bar in Honolulu that was frequented by American servicemen.
Dhiegh was cast on Hawaii Five-O by executive producer Leonard Freeman who remembered his portrayal of a Chinese spy in the classic 1962 film The Manchurian Candidate.