Neos Marmaras is a town on the Sithonia peninsula, in the Chalkidiki peninsula, Macedonia, Greece. In 2021, Neos Marmaras had 3,038 permanent residents; however, the summer-time population has been estimated at 20,000. The main industries are tourism, agriculture, and fishing. Situated on three shoreline hills, below the two mountains, Itamos and Tragoudeli, Neos Marmaras is located 125 kilometres (78 mi) from Thessaloniki, 55 kilometres (34 mi) from Poligyros and 9 kilometres from Elia (Nikiti).

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.