Kassandra or Kassandra Peninsula is a peninsula and a municipality in Chalkidiki, Macedonia, Greece. The seat of the municipality is in Kassandreia.

Chalkidiki, also known as Chalcidice, is a peninsula and regional unit of Greece, part of the region of Central Macedonia, in the geographic region of Macedonia in Northern Greece. The autonomous Mount Athos region constitutes the easternmost part of the peninsula, but not of the regional unit.