The September 11 attacks resulted in the destruction or severe damage of a total of 56 buildings in New York City. Specifically, five buildings fully collapsed, including the Twin Towers (World Trade Center 1 and 2) and other structures within the World Trade Center complex. Three buildings partially collapsed, 11 had major damage, and 37 sustained moderate damage. Every building in the World Trade Center complex either fully or partially collapsed. Beyond New York City, three other buildings were damaged, including the Pentagon and two houses in Pennsylvania. To summarize the key destroyed buildings:
- The Twin Towers (WTC 1 and 2) fully collapsed.
- Four other buildings in the WTC complex were also destroyed or severely damaged beyond repair.
- The St. Nicholas Greek Orthodox Church was fully destroyed.
- Several other buildings including Fiterman Hall and Deutsche Bank building were severely damaged and later demolished.
In total, the Federal Emergency Management Agency lists 56 buildings damaged or destroyed in New York City due to the attacks.