Map of Japanese provinces (1868
) with Dewa Province highlighted
Dewa Province (出羽国 Dewa no kuni) is an old province of Japan in the area of Yamagata Prefecture and Akita Prefecture on the island of Honshū. It was sometimes called Ushū (羽州).
Map of part of Dewa Province, 1838
In 708, Dewa-no kuni was separated from Echigo.
In 712, Dewa and Mutsu Province were reorganized
Shiba Kaneyori received the Dewa Province as a fief from Ashikaga Takauji in 1335.
In the Meiji period, the provinces of Japan were converted into prefectures. The maps of Japan and Dewa Province were reformed in the 1870s.
Ōmonoimi jinja was the chief Shinto shrine (ichinomiya) of Dewa. 
Media related to Dewa Province at Wikimedia Commons
Coordinates: 39°00′59″N 140°19′02″E / 39.01639°N 140.31722°E