2. Greece
No. of Blue Flag beaches: 596
Greece is right behind Spain with 596 certified Blue Flags, 94 of them from the Halkidiki region on the northern side of the country. Kampoudi Beach, located near Ouranoupolis in this region, has been awarded three Blue Flags each year since 1951. It’s a long, sandy beach that is easily accessible by road, has shallow waters ideal for kids and is well-equipped with disability-friendly facilities such as ramps in different parts of the beach. Sail around the beach or rent a boat and explore the island. [/size
https://www.cntraveller.com/article/blue-flag-beachesUnconfirmed but likely to be correct: Kefalonia awarded 16 Blue Flags, ithaka 2.
IthakaMunicipality of Ithaka beach
Town beach (left)
ArgostoliAvythos
Ai Helis
Ammes
Aragia, Poros
Lourdas
Makris Yialos
Great Ammos
Bouka, Gradakia
Platis Yialos
Skala (beach 1)
Skala (beach 2)
LixouriMunicipal beach
Xi
Petani
Lepeda
SamiAntiSamos
Myrtos
Edit: Hm, I make it 17 on Kef...