Imabari Castle is a Japanese castle in Imabari, Ehime, Japan. It was the center of Imabari Domain under the Edo Period Tokugawa shogunate and was ruled by a branch of the HisamatsuーMatsudaira clan through most of its history.

Imabari Domain was a feudal domain under the Tokugawa shogunate of Edo period Japan, in what is now eastern Ehime Prefecture on the island of Shikoku. It was centered around Imabari Castle in what is now the city of Imabari, Ehime, and was ruled throughout most of its history by a cadet branch of the Hisamatsu-Matsudaira clan. Imabari Domain was dissolved in the abolition of the han system in 1871 and is now part of Ehime Prefecture.