Hachijō is a town in Hachijō Subprefecture, part of Tokyo Metropolis, Japan. It lies within the Izu Islands chain, which administratively belongs to Tokyo even though it sits far to the south of the city's main urban area. The town covers a total area of 72.24 square kilometres (27.89 square miles).
As of 1 December 2022, Hachijō had an estimated population of 7,056, giving it a population density of 97.7 persons per square kilometre. The town is known for generating its electric power from renewable sources: a geothermal power station and a wind farm supply its electricity.