The Philadelphia Naval Shipyard was an important naval shipyard of the United States for almost two centuries.
Philadelphia's original navy yard, begun in 1776 on Front Street and Federal Street in what is now the Pennsport section of the city, was the first naval shipyard of the United States. The new, much larger yard grew up around facilities begun in 1871 on League Island at the confluence of the Delaware and Schuylkill rivers.
The United States Navy ended most of its activities there in the 1990s; subsequently, in 2000, the Philadelphia Industrial Development Corporation, on behalf of the city of Philadelphia, acquired and began to redevelop the land. First called Philadelphia Naval Business Center, it is now known as The Navy Yard. It is a large mixed-use campus that employs nearly 15,000 people across a mix of industries, and includes cutting edge cell therapy production facilities, global fashion companies, and a commercial shipyard. The Navy still has a Naval Inactive Ship Maintenance Facility and a few engineering activities at the site.