You might be surprised to learn that some Greeks actually live on islands inhabited by as few as five to as much as around 200 people.

Marathi Island has only 5 inhabitants. This wonderful island is only 355 square kilometers located east of Patmos and has an untouched coastline of 4 kilometers.
Irakleia is an island with only 141 inhabitants. The island is 17.795 square kilometers and it is located between the islands of Naxos and Ios.
The island of Donousa has only 167 inhabitants and an area of 13.75 square kilometers. It is located between Naxos and Amorgos and is one of the smallest islands in Cyclades.

Agathonisi is a tiny island located in the northernmost point of the Dodecanese. There are 185 inhabitants on the 13.5 square kilometer island.