Lists of tenants in the World Trade Center (1973–2001)

These are lists of the major tenants of the former World Trade Center in New York City at the time of the attacks in 2001. The Marriott World Trade Center (also known as 3 World Trade Center) was a hotel owned by Marriott.

• One World Trade Center (North Tower) included the Port Authority of New York and New Jersey, Marsh & McLennan Companies, Bank of America, Cantor Fitzgerald, Dai-Ichi Kangyo Group, Sidley Austin Brown & Wood, and Restaurant Windows on the World.
• Two World Trade Center (South Tower) included Verizon, the New York Stock Exchange, Morgan Stanley, Xerox Corporation, Keefe, Bruyette & Woods, Aon Corporation, and Fiduciary Trust Company International.
• 5 World Trade Center included Credit Suisse First Boston and Morgan Stanley.
• 6 World Trade Center included the United States Department of Commerce, Bureau of Alcohol, Tobacco, Firearms and Explosives, and the United States Department of Labor.
• 7 World Trade Center included Salomon Smith Barney, the U.S. Securities and Exchange Commission, Standard Chartered Bank, and the U.S. Secret Service.