Hachinohe Castle (八戸城, Hachinohe-jō) was a Japanese castle that formed the administrative center of Hachinohe Domain, a feudal domain of the Nambu clan, located in the center of what is now the city of Hachinohe in Aomori Prefecture, Japan.

It had two sets of concentric moats, and a two-story central structure with a barracks, but no donjon.

After the Meiji Restoration, the new Meiji government ordered the destruction of all former feudal fortifications, and in compliance with this directive, all structures of Hachinohe Castle were pulled down in 1871, with the Miyagi Jinja (三八城神社) Shinto shrine erected inner bailey in its place.

One gate built in 1797 from the palace has survived as a gate to the private residence of the descendants of Hachinohe Nambu clan, who received the title of viscount under the kazoku peerage system in the Meiji period.

This Sumigoten Omote Gate (角御殿表門) is an Aomori Prefecture Important Cultural Property.