The PPL Building, formerly the Pennsylvania Power and Light Building, is a 24-story office building in Allentown, Pennsylvania. At 98.02 m (321.6 ft) in height, it is the tallest building in the city and the surrounding Lehigh Valley metropolitan area. The building is the headquarters for PPL Corporation, the main electricity provider for the Lehigh Valley, Northeastern Pennsylvania, and other regions of Pennsylvania and the United States.

The PPL Building is often uniquely illuminated at night, especially during the Christmas season, with a candle on one face of the building, and a Christmas tree on the other.

The PPL Building was built from 1926 to 1928. It was built by Pennsylvania Power & Light, forerunner of PPL, and to this day has been the headquarters of the company. The building was designed by architect and skyscraper pioneer Harvey Wiley Corbett, who would later have a hand in designing New York City's Rockefeller Center and other prominent buildings. The building exterior features bas reliefs by Alexander Archipenko.

In 1930, the PPL Building was named the "best example of a modern office building" by Encyclopædia Britannica, and also featured the world's fastest elevator.

During the 1960s, PPL supported the local United Fund community fund drive program by using the building's brightly lit windows at night to spell out the abbreviation "U.F." to remind area residents to contribute to the fund drive.

In June of 2023, PPL Corporation announced plans to vacate the building and put it up for sale.

Exterior shots of the PPL Building appear in Executive Suite, a 1954 film.