Willard G. Rouse III (1942 – April 30, 2003) was an American real estate developer. Rouse was the developer of One Liberty Place, designed by Helmut Jahn, the first structure in Philadelphia to exceed the traditional height limitation established by the top of the statue of William Penn atop Philadelphia City Hall. He famously clashed with city planner Edmund Bacon over the landmark development, which was quickly followed by additional tall buildings. Rouse was the nephew of developer James Rouse.
Rouse founded Rouse and Associates, a real estate development company primarily focused on office and industrial development in select cities in the United States. In 1994, the company went public as a UPREIT and is now known as Liberty Property Trust (Ticker:LRY), headquartered in Malvern, Pennsylvania.
Rouse was also involved in the construction of the Kimmel Center for the Performing Arts and the Pennsylvania Convention Center.