1) "Around 72.8% of the Greek population (7.98 million) live in cities. ... A large proportion of the 27.2% rural population (2.98 million) live on islands." Source: http://linkinghub.elsevier.com/retrieve/pii/S0300957204002679 2) "The author notes that the total population of the Greek islands is about 1.4 million living on about 100 inhabited islands." Source: The population of the Greek islands (1981) http://www.popline.org/docs/247612 Total population: - 1981 9,740,417 - 2007 11,338,624 Estimation http://en.wikipedia.org/wiki/Demographic_history_of_Modern_Greece 3) So in 1981, the percentage living on islands was about: 1,400,000 / 9,740,417 = .14 = 14% As most of the island inhabitants are from the rural population, this proportion could be lower today. 4) Here the populations of some islands: - Crete: "The islands population is 650,000 people" http://www.atlasinternational.com/en-GB/greek-islands/buying-in-the-greek-islands/Crete.htm "Greek Island /Alternative Name/ Island Capital /Population (Census Year)/ Island Area (square km) " "Rhodes Rodos Rhodes Town 130,000 (2004) 1398 " "Kerkyra Corfu Corfu 105,043 (1991) " "Zakynthos Zante Zakynthos Town 38,957 (2001) 410 " "Kefallonia Cephalonia Argostoli 32,314 (1991) 935 " "Kos Cos Kos 30,071 (2001) 288 " Source and further information: http://www.pubquizhelp.34sp.com/geo/greek_islands.html