In Sifnos you will find branches of all major Greek banks as well as ATMs to cover your needs.
1. National Bank, Apollonia, tel. +30 22840 35601
2. Alpha Bank, Apollonia, tel. +30 22840 33913
3. Piraeus Bank, Branch: Central Square in Apollonia, tel. +30 22840 35000/ ATM: Port Exit Koulouri Square, Kamares & Embellishing Association of Platis Gialos in Sifnos, Coast Road, Platis Gialos