Basketball at the 2004 Summer Olympics was the sixteenth appearance of the sport of basketball as an official Olympic medal event. It took place at the Helliniko Olympic Indoor Arena, a part of the Hellinikon Olympic Complex, in Athens, for the preliminary rounds, with the later stages being held in the Olympic Indoor Hall at the Athens Olympic Sports Complex.

The Hellinikon Olympic Indoor Arena was a multi-use sports indoor arena that was located in Elliniko, a suburban town in the southern part of the Athens urban agglomeration, Greece. It was a part of the Hellinikon Olympic Complex, and it was located adjacent to the Helliniko Fencing Hall. It was approximately 10 miles from the Athens Olympic Village. It was built on the site of the former Hellinikon International Airport for the 2004 Summer Olympics and the 2004 Summer Paralympics.