Wall Street is the name of a narrow thoroughfare in lower Manhattan running east from Broadway downhill to the East River. Considered to be the historical heart of the Financial District, it was the first permanent home of the New York Stock Exchange. .

The phrase "Wall Street" is also used to refer to financial markets as a whole. Interestingly, most New York financial firms are no longer headquartered on Wall Street (JPMorgan Chase, the last major holdout, sold its headquarters tower at 60 Wall Street to Deutsche Bank in November 2001), but elsewhere in lower and midtown Manhattan.

As a figure of speech contrasted to "Main Street," the term can refer to big business interests as against those of small business. It is sometimes used more specifically to refer to research analysts, shareholders, or investment banks.