Albanians in Greece form the country's largest population group after the ethnic Greek majority. Due to different waves of migration, they are divided into distinct communities. The main group is that of Albanians in Northwestern Greece, who form a national minority, while other populations of Albanian origin have been assimilated into the Greek nation, becoming only an ethno-lingustic minority. Alongside these two indigenous groups, about 10 percent of the population of Albania has entered Greece after the fall of Communism, forming the third community of Albanian origin in Greece.
official data (2008), there are 459,390 (including 185,000 ethnic Greeks from Albania) holders of Albanian citizenship in Greece.
with illegal Albanians about 750,000
http://www.eliamep.gr/en/wp-content/uploads/2009/02/migration-and-migration-policy-in-greece-critical-review-and-policy-recommendations.pdf
