Half Tree Hollow is the "suburb" of Jamestown, Saint Helena, a British island territory in the South Atlantic Ocean. The village is built at the top of Jacob's Ladder, a hillside stairway connecting it with Jamestown. The village was built because of the lack of adequate space in Jamestown and because of its geology.
Half Tree Hollow has a population that is greater than that of Jamestown. In 2008 it had a population of 901, compared to a population of 1,140 in 1998. It is a district of the island and at 1.6 km2 it is the smallest, the most populated and the most densely populated district. The district includes Ladder Hill.