Elliniko, also historically known by its former name Hellinikon, is a southern suburban town located within the Athens agglomeration in Attica, Greece. Following the local government reform of 2011, it became a municipal unit of the municipality of Elliniko-Argyroupoli.
The area is primarily known for hosting the former Hellinikon Olympic Complex. This was a temporary sporting complex constructed on the grounds of the former Ellinikon International Airport to serve as a venue for the 2004 Summer Olympics and the 2004 Summer Paralympics.