What is the tallest building in the United States?

The tallest building in the United States is One World Trade Center.

Located in Lower Manhattan, One World Trade Center reaches 1,776 feet, including its architectural spire. The height deliberately references the year 1776 and gives the rebuilt tower a powerful national symbolism as well as a place at the top of the U.S. skyline.

Designed by David Childs of Skidmore, Owings & Merrill, the tower became New York City’s tallest structure in 2012, surpassing the Empire State Building. It officially opened for business in November 2014, with Condé Nast among its earliest major tenants.

A frequent mix-up involves Willis Tower, formerly the Sears Tower, which held the U.S. height record from 1974 until One World Trade Center’s completion. Another is the distinction between a building and a structure: One World Trade Center is the tallest U.S. building, while measurements that include antennas or compare towers worldwide can produce different rankings.