The Indoor arena is an arena adjacent to the Fencing Hall. It hosted the Basketball preliminary matches and the Handball finals at the 2004 Summer Olympics in Athens, Greece. The facility seats 14,500 spectators for basketball - though only 10,700 seats were made publicly available during the Olympics - and seats 13,000 fans for handball - though only 10,300 seats were made publicly available during the games. The facility was completed on May 31, 2004 and officially opened on July 30, 2004.

The fencing Hall is an arena adjacent to the Indoor Arena. It hosted the Fencing matches at the 2004 Summer Olympics in Athens, Greece. The facility seats 3,800 for the preliminary matches and 5,000 for the final matches. The facility was officially opened on July 30, 2004.

The Markopoulo Olympic Shooting Centre was the site of the shooting events at the 2004 Summer Olympics in Athens, Greece. The venue is located in Markópoulo, on the outskirts of the eastern suburbs of Athens. It has a seating capacity of 4,000, though a public capacity of only 2,330 for the Olympics. The venue was completed in March, 2004 and officially opened on August 2, 2004, shortly before the beginning of the Olympics.

The Olympic Aquatic Centre is a complex at the Athens Olympic Sports Complex, consisting of two outdoor pools and one indoor pool, that was built for the 1991 Mediterranean Games. It was refurbished and expanded for the 2004 Summer Olympics. The larger of the outdoor pools, which seats 11,500 spectators, hosted swimming and water polo events. The indoor pool, which hosted the diving events, sat 6,200 observers.

The Goudi Olympic Hall hosted the Badminton events at the 2004 Summer Olympics in Athens, Greece.The hall seats 5,000 spectators. Construction at the facility was completed on May 30, 2004, and was officially opened on July 30, 2004.

Beach volleyball at the 2004 Summer Olympics held at the Olympic Beach Volleyball Centre stadium in Faliro.

Ano Liossia Olympic Hall was the host to judo and wrestling at the 2004 Summer Olympics in Athens, Greece. The arena seats up to 9,000, but will only have a capacity of 6,000 for the Olympics. The hall is situated in Ano Liosia, a suburb northwest of central Athens.

Galatsi Olympic Hall is an indoor arena in Athens, Greece. It is located in Galatsi and it was the site of Table Tennis and Rhythmic Gymnastics at the 2004 Summer Olympics. The arena was completed in May 2004 and officially opened on July 30, 2004, shortly before the beginning of the Olympics. It has also hosted various basketball games. The arena seats 6,500.

The Olympic Baseball Centre in Athens consists of two Baseball stadiums. It was the site of the Baseball games at the 2004 Summer Olympics in Athens, Greece. The facility consists of two fields. The larger stadium seats 8,700 fans-though only 6,700 seats were made publicly available during the Olympics - and the smaller stadium seats 4,000 spectators- though only 3,300 seats were made publicly available during the Games. The facility had to be constructed with significant foreign help in the design, as there were only a handful of dusty baseball diamonds in the whole of Greece before the 2004 Olympics were awarded to Athens in 1997. Construction on the facility was completed on February 27, 2004, and it was officially opened on August 12, 2004, a day before the Opening Ceremonies.

The Olympic Tennis Centre is a grouping of 16 tennis courts at the Athens Olympic Sports Complex. It hosted the tennis matches at the 2004 Summer Olympics in Athens, Greece. The centre consists of a main stadium, known as the Main Court, seating 8,600 fans - though only 6,000 seats were made publicly available during the Olympics - two semifinal courts seating 4,300 spectators - though only 3,200 seats were made publicly available during the Olympics - and thirteen side courts seating 200 observers each. The centre was completed in February 2004 and officially opened on August 2, 2004.

Each of the courts use the DecoTurf cushioned acrylic surface, the same surface as the U.S. Open Grand Slam event. The Main Court, in particular, was extremely large by the standards of major tennis competitions, with the seats relatively far removed from the tennis court.

Located in the area of Maroussi in Athens, it is the major Greek stadium and hosted the athletics events and the football (soccer) final at the 2004 Summer Olympics. It also hosted the opening ceremony on August 13, 2004, and the closing ceremony on August 29, 2004. The stadium's record attendance is 74,473 but it was configured to seat 72,000 during the Olympics, though only 56,700 seats were made publicly available for the track and field events and slightly more for the football final. The turf system was installed by GreenTech ITM and consists of natural grass in modular containers which incorporate irrigation and drainage systems.

Vouliagmeni Olympic Centre was the site of the men's and women's triathlon at the 2004 Summer Olympics at Athens, Greece. Located at Vouliagmeni, to the southeast of Athens, the temporary facility seats up to 3,600, though only 2,200 seats will be publicly available for the event.