Mount Athos is located at the eastern end of the Chalcidice Peninsula on the tip of a narrow strip of land jutting into the Aegean Sea just east of modern - day Thessaloníki.
Athose mägi asub Chalkidike poolsaarel (mis ulatub tänapäeva Thessalonike linnast itta Egeuse mereni), selle idapoolseimal harul kitsa maariba tipus.