Imabari is a city in Ehime Prefecture, Japan. It is the second largest city in Ehime Prefecture. As of 31 August 2022, the city had an estimated population of 152,111 in 75947 households and a population density of 360 persons per km². The total area of the city is 468.19 square kilometres (180.77 sq mi). The population is the second largest in Ehime Prefecture after Matsuyama City.

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.