List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
List of tallest buildings in the United States
As of 2018, One World Trade Center in New York City is considered to be the tallest skyscraper in the United States. Its spire brings the structure to a symbolic height of , connoting the year The Declaration of Independence was signed, though the tip of the structure actually is measured at . However, using the more common criterion for the height of a building (the roof, not antenna) the observation deck elevation and highest occupied floor of One World Trade Center are surpassed by Chicago's Willis Tower (formerly and still commonly known as the Sears Tower) and 432 Park Avenue.