Kyriakos Onesiphorou was a Greek athlete who competed in the 200m and the 400m.
Onesiphorou was born on April 10, 1951 in Nicosia, Cyprus. He competed for GS Pancypria of Nicosia.
He broke the Greek record for the 400m seven times, the last time being on July 6, 1975 with 46:56.
His best time in the 200m was 216.
Onesiphorou was also a member of the 4x400 relay team of Greece.
Among his accomplishments were:
- A gold medal in the 400m at the Mediterranean Games of 1971 (46.9)
- Silver medals in the 400m at the Balkan Games of 1971 and 1972
- Bronze medals in the 400m at the Balkan Games of 1973 and 1975.