Greektown is a general name for an ethnic enclave populated primarily by Greeks or people of Greek ancestry, usually in an urban neighborhood.

The oldest Greek dominated neighborhood outside of Greece were probably the Fener in Istanbul, or the Ash Shatibi in Alexandria.

In Vienna, for many centuries, the Griechenviertel (Greek quarter) existed in the Innere Stadt (inner town). Later the Greek community moved to other newer quarters. A traditional Austrian restaurant there is called Griechenbeisl (Greek tavern) and a street Griechengasse (Greek lane).^{[citation needed]}

Beloiannisz is a village in Fejér county, Hungary. It was founded by Communist Greek refugees who left Greece after the civil war, and was named after Nikos Beloyannis (Beloiannisz is the Hungarian spelling of his name).

Yaghdan, is a village in the Lori Province of Armenia. It has a majority of Greeks. The Alaverdi province in Armenia is mainly inhabited by ethnic Armenians with a minor Greek community that was once considered the largest in Armenia. The Greeks in Armenia speak the Pontic dialect and they are fluent in both Armenian and Russian. The Madan neighbourhood of Alaverdi used to have a large Greek community during the Soviet period.

The following pages provide some history regarding certain Greek communities in Canada.

A typical housing pattern found in United States' Greektowns is to buy a multiple story dwelling, move into the lower floor and rent the upper floors to other Greeks.

The largest Greek community in the USA is located in Queens, NY.