相馬氏
The was a minor feudal domain under the Tokugawa shogunate of Edo period Japan based in southern Mutsu Province in what is now part of the Hamadōri region of modern-day Fukushima Prefecture. It was ruled for the entirety of its history by the Sōma clan. It was centered at Sōma Nakamura Castle in what is now part of the city of Sōma. The domain was also known as or .