Langlee Island or Langley Island is an island in the Hingham Bay area of the Boston Harbor Islands National Recreation Area. The island has a permanent size of 4 acres (16,000 m²), plus an intertidal zone of a further 3 acres (12,000 m²), and is composed of a massing of Roxbury puddingstone which rises to a height of 40 feet (12 m) above sea level. This results in steep cliffs on the northern shore, whilst there are several small sandy beaches and a tidal mudflat on the east side. The center of the island contains glacial till that supports tree and shrub cover.