New Market, as it was originally known, and later also known as Head House (or Headhouse) Market and Second Street Market, is a historic street market on South 2nd Street between Pine and Lombard Streets in the Society Hill neighborhood of Philadelphia, Pennsylvania. With a history dating to 1745, it is one of the oldest surviving market buildings of its type in the nation. This portion, which survives from a longer structure originally extending all the way to South Street, was designated a National Historic Landmark in 1966, and is the centerpiece of the Head House Square historic district.