List of tenants at 2 World Trade Center

The South Tower (also known as Tower 2, Building Two or 2 WTC) was one of the original Twin Towers in the original World Trade Center in New York City, New York. The Tower was completed and opened in 1973 at a height of 415 meters (1,362 ft) to the roof, distinguishable from its twin, the North Tower by its outdoor observation deck and the absence of a television antenna. Both the South Tower, and the North Tower had mechanical floors, and the same type of walls. The new 2 World Trade Center (currently on hold), has the same flat roof, with no observation deck, and no mechanical floors.

The address of this building was 2 World Trade Center with the WTC complex having its own ZIP code of 10048. It was destroyed along with the North Tower (1 World Trade Center) in the September 11 attacks. The South Tower was the second tower to be struck, at 9:03 a.m., and the first tower to collapse, at 9:59 a.m. Of the 2,977 victims killed in the attacks, 614 were in or above the South Tower impact zone. At the National September 11 Memorial & Museum, the southern pool marks the spot where the South Tower stood.

On the 107th floor of this building was a popular tourist attraction called Top of the World Trade Center Observatories. On the roof was an observation deck accessible to the public and a disused helipad at the center.

Note: Floor numbers in red are part of United Airlines Flight 175's impact area, with trapped floors above this zone marked in dark gray.