Spetses is an island in Attica, Greece. It is counted among the Saronic Islands group. Until 1948, it was part of the old prefecture of Argolis and Corinthia Prefecture, which is now split into Argolis and Corinthia. In ancient times, it was known as Pityussa.

Argolis or Argolida is one of the regional units of Greece. It is part of the region of Peloponnese, situated in the eastern part of the Peloponnese peninsula and part of the tripoint area of Argolis, Arcadia and Corinthia. Much of the territory of this region is situated in the Argolid Peninsula.