Miyagi Prefecture is situated in the northern region of Japan's island of Honshu, where it occupies an area of 7,292 square kilometers.
Miyagi is bordered by the Pacific Ocean and by Iwate, Fukushima, Akita, and Yamagata prefectures.
On March 31, 2006, the city of Furukawa merged with the towns of Iwadeyama and Naruko from Tamatsukuri District and Kashimadai, Matsuyama and Sanbongi from Shida District and Tajiri from Toda District to create the new city of Osaki.