Parts of the Financial District are in various USPS postal ZIP Codes, including 02108, 02109, 02110, and 02111.

The area includes Post Office Square, the Exchange Place and International Place complexes, and the landmark Custom House Tower (now an 87-room Marriott Vacation Club), and borders Quincy Market, Faneuil Hall, and the Old State House.

The Financial District also contains the headquarters of the mutual fund companies Fidelity Investments, Putnam Investments, and DWS Scudder Investments; the world headquarters for State Street Bank and Eastern Bank; accounting firms Wolf & Company, P.C., RSM McGladrey, and BDO USA, LLP; loan advisor The Debt Exchange; the law firms of Bingham McCutchen, Goodwin Procter, WilmerHale, Kirkpatrick & Lockhart Nicholson Graham, and Mintz, Levin, Cohn, Ferris, Glovsky, and Popeo, PC; the local headquarters of Bank of America (formerly Fleet Bank) and Santander Bank; the Langham Hotel Boston and Hilton Hotel; and the local offices of Merrill Lynch and other brokerages.

Russia Wharf was completed in 2011 along the Fort Channel and rises up to 395 feet and 32 stories.

Construction of South Station Tower was scheduled to begin in 2009 but was put on hold until the spring of 2020, moving forward despite the presence of COVID-19.