Chalkidiki, also spelt Chalkidike, Chalcidice, Khalkidhiki or Halkidiki (Greek: Χαλκιδική), is a peninsula and regional unit of Greece, part of the Region of Central Macedonia in Northern Greece. The autonomous Mount Athos region constitutes the easternmost part of the peninsula, but not of the regional unit.
The capital of Chalkidiki is the main town of Polygyros, located in the centre of the peninsula.
Chalkidiki is a three-fingered peninsula, namely Kassandra, Sithonia and Mount Athos and also has a continental part.
Chalkidiki is a popular summer tourist destination. With countless beaches, forests, waterfalls, stone villages and one of the world's great monastic communities, Halkidiki is for endless vacations during summer time. It offers everything that one can hope for, from busy resorts with clubs and bars for young people to quiet picturesque small traditional villages for relaxing, crowded beaches and unorganized isolated ones, trekking paths up on the mountains, nature to be enjoyed, water sports, shopping possibilities, museums, churches, thermal baths, ancient and byzantine sites, options for daily trips and cruises, open air cinemas, film festivals and traditional celebrations.