The first recorded mention of Judaism in Greece dates from 300-250 BCE on the island of Rhodes.
In the 2nd century BCE, Hyrcanus, a leader in the Jewish community of Athens, was honoured by the raising of a statue in the agora.

According to Edmund Veckenstedt, Ganymede was a Semite, as his brothers Ilus  and Assarakos  were no doubt.
 According to Josephus (Contra Apionem, I, 176-183), an even earlier mention of a Hellenized Jew by a Greek writer was to be found in the work "De Somno" (not extant) by the Greek historian Clearchus of Soli.
Here Clearchus describes the meeting between Aristotle (who lived in the 4th century BCE) and a Jew in Asia Minor, who was fluent in Greek language and thought:
"'Well', said Aristotle, [...] 'the man was a Jew of Coele Syria (modern Lebanon).
These Jews were derived from the Indian philosophers, and were called by the Indians Kalani.
Now this man, who entertained a large circle of friends and was on his way from the interior to the coast, not only spoke Greek but had the soul of a Greek.
During my stay in Asia, he visited the same places as I did, and came to converse with me and some other scholars, to test our learning.
But as one who had been intimate with many cultivated persons, it was rather he who imparted to us something of his own.'"

Archaeologists have discovered ancient synagogues in Greece, including the Synagogue in the Agora of Athens and the Delos Synagogue, dating to the 2nd century BCE.

Greek Jews played an important role in Greek history, from the early History of Christianity, through the Byzantine Empire and Ottoman Greece, until the tragic near-destruction of the community after Greece fell to Nazi Germany in World War II.
The first recorded mention of Judaism in Greece dates from 300-250 BCE on the island of Rhodes. In the 2nd century BCE, Hyrcanus, a leader in the Jewish community of Athens, was honoured by the raising of a statue in the agora.
According to Edmund Veckenstedt, Ganymede was a Semite, as his brothers Ilus  and Assarakos  were no doubt.  According to Josephus (Contra Apionem, I, 176-183), an even earlier mention of a Hellenized Jew by a Greek writer was to be found in the work "De Somno" (not extant) by the Greek historian Clearchus of Soli. Here Clearchus describes the meeting between Aristotle (who lived in the 4th century BCE) and a Jew in Asia Minor, who was fluent in Greek language and thought:
"'Well', said Aristotle, [...] 'the man was a Jew of Coele Syria (modern Lebanon). These Jews were derived from the Indian philosophers, and were called by the Indians Kalani. Now this man, who entertained a large circle of friends and was on his way from the interior to the coast, not only spoke Greek but had the soul of a Greek. During my stay in Asia, he visited the same places as I did, and came to converse with me and some other scholars, to test our learning. But as one who had been intimate with many cultivated persons, it was rather he who imparted to us something of his own.'"
Archaeologists have discovered ancient synagogues in Greece, including the Synagogue in the Agora of Athens and the Delos Synagogue, dating to the 2nd century BCE.
Greek Jews played an important role in Greek history, from the early History of Christianity, through the Byzantine Empire and Ottoman Greece, until the tragic near-destruction of the community after Greece fell to Nazi Germany in World War II.
History of the Jews in Greece