奥州街道
The area of present-day Koori was part of ancient Mutsu Province. During the Edo period, it was "tenryō" territory under direct control of the Tokugawa shogunate and was the site of a "daikansho" as well as a post station on the Ōshū Kaidō and the Hasshu Kaidō highways. After the Meiji Restoration, it was organized as part of Nakadōri region of Iwaki Province. The town of Koori was created on April 1, 1889 with the creation of the modern municipalities system. It annexed the neighboring villages of Mutsuai, Danzaki and Handa on March 31, 1954.