McCormick Apartments, also known as Andrew Mellon Building, Mellon Apartment, or 1785 Massachusetts Avenue Northwest, is a landmark apartment building on Embassy Row in Washington, D.C., whose inhabitants once included Andrew W. Mellon. It is the home of the American Enterprise Institute.

Embassy Row is the informal name for a section of Northwest Washington, D.C., with a high concentration of embassies, diplomatic missions, and diplomatic residences. It spans Massachusetts Avenue N.W. between 18th and 35th street, bounded by Scott Circle to the south and the United States Naval Observatory to the north; the term is often applied to nearby streets and neighborhoods that also host diplomatic buildings, such as Kalorama.