Itō is a city located on the eastern shore of the Izu Peninsula in Shizuoka Prefecture, Japan. As of 1 August 2023, the city had an estimated population of 63,343 and a population density of 510 persons per km2. The total area was 124.13 square kilometres (47.93 sq mi).

The Izu peninsula is a large mountainous peninsula with a deeply indented coastline to the west of Tokyo on the Pacific coast of the island of Honshu, Japan. Formerly known as Izu Province, Izu peninsula is now a part of Shizuoka Prefecture. The peninsula has an area of 1,421.24 km2 (548.74 sq mi) and its estimated population in 2005 was 473,942 people. The peninsula’s populated areas are located primarily on the north and east.