The ExxonMobil Building, also known as the Exxon Tower or Humble Oil Building, is a 45-story skyscraper located at 800 Bell Street in Houston, Texas. Completed in 1963 and designed by Welton Becket & Associates, it features distinctive exterior "fins" that provide shade from the sun.

Standing 606 feet tall, it was the tallest building west of the Mississippi River when built, surpassing Dallas's Republic Bank Tower. However, it held this title only until 1965, when Elm Place in Dallas took the record.