Nikolaos Syllas (Greek: Νικόλαος Σύλλας; 30 November 1914 – 16 August 1986) was a Greek athlete who competed in the 1936 Summer Olympics, in the 1948 Summer Olympics, and in the 1952 Summer Olympics. He was born in Chios. At the 1952 edition he was flag bearer for Greece.
Outside of the Olympics, he was a silver medallist at the 1951 Mediterranean Games behind Italy's Giuseppe Tosi (an Olympic medallist). He was also a three-time participant for Greece at the European Athletics Championships, competing 1934, 1946 and 1950.