Ray Cillien (June 26, 1939 – September 22, 1991) was a boxer from Luxembourg.
He was born in Esch-sur-Alzette.
Cillien was member of the Luxembourgish Olympic team at the 1960 Summer Olympics in Rome.
After a bye in the first round of the light-heavyweight division, he was eliminated in the second round by Soviet Gennadiy Shatkov.
Below are the results of Ray Cillien, a light heavyweight boxer who competed for Luxembourg at the 1960 Rome Olympics: