This list of tallest buildings in Knoxville ranks skyscrapers and other structures by height in the U.S. city of Knoxville, Tennessee. The tallest building in Knoxville is the First Tennessee Plaza (Plaza Tower), at 27 stories, followed by the adjacent Riverview Tower, at 24 stories. The Tower at Morgan Hill (formerly the Kingston Apartments) is the third highest at 21 stories. The Sunsphere, which stands at 265 feet (81 m), is the city's fourth tallest.