The area of present-day Kesennuma was part of ancient Mutsu Province and has been settled since at least the Jōmon period by the Emishi people, as evidenced by numerous shell middens found in coastal areas. During the later portion of the Heian period, the area was ruled by the Northern Fujiwara. During the Sengoku period, the area was contested by various samurai clans before the area came under the control of the Date clan of Sendai Domain during the Edo period, under the Tokugawa shogunate. The town of Kesennuma was established on June 1, 1889 within Motoyoshi District, Miyagi with the establishment of the modern municipalities system.