Madison Avenue is a Manhattan avenue that carries northbound one-way traffic. It runs from Madison Square (at 23rd Street) to the Madison Avenue Bridge at 138th Street. In doing so, it passes through Midtown, the Upper East Side (including Carnegie Hill), Spanish Harlem, and Harlem. It is named after and arises from Madison Square, which is itself named after James Madison, the fourth President of the United States. Since the 1920s, the street's name has been synonymous with the American advertising industry.
Columbia's Midtown campus was located along the street, and is sometimes referred to as the "Madison Avenue campus".
The term "Madison Avenue" is often used metonymically for advertising, and Madison Avenue became identified with the advertising industry after the explosive growth in this area in the 1920s.In recent decades, many agencies have left Madison Avenue, with some moving further downtown and others moving west.
Between 57th Street and 85th Street, Madison Avenue is where many well known fashion designers, jewelers and upper class hair salons are located.