哈尔基季基州（希腊语：Χαλκιδική, 宽式IPA：/xalkʲiðiˈkʲi/）是希腊的一个州。哈尔基季基州属中马其顿大区管辖。面积2917.877平方公里，在希腊的省份中排名第17位。人口109,587人，位列希腊各州中第33位。该州的首府所在地是波利伊罗斯。该州唯一在陆上接壤的州份是塞萨洛尼基州。

Chalcidice or Chalkidiki or Halkidiki (Greek:Χαλκιδική [xalciðiˈci]), 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.