That would be Illinois and the Willis Tower is the tallest building in the US not the world.
Chicago.
No US State. The tallest building at 2,722 ft is in Dubai in the United Arab Emirates.
Aon center
The tallest building in Los Angeles is the US Bank Tower which rises 1,018 ft. (310 m.) tall.
The tallest building in the Cayman Islands is the PWC Building.
it is on the list of tallest buildings but is not the tallest building.
Illinois does. The Willis Tower (aka Sears Tower) in Chicago, Illinois is currently the tallest building in the U.S.Chicago- Sears tower
The tallest building in the US is the Willis Tower, Chicago IL
Illinois has the Sears Tower which is now called the Willis Tower. It is the second tallest in the US. The tallest in the US is the One World Trade Center in New York City.
As of August 2011, the tallest building in the US is the "Willis Tower" in Chicago, Illinois (formerly known as the Sears Tower). Soon, however, the tallest building (currently under construction) will be the "Freedom Tower" in New York, New York. Prior to September 11, 2001, the tallest building in the US was a tie between the two free standing World Trade Centers in New York.
Chicago