Tanba Province

 was an old province of Japan. The ambit of its borders encompassed both the central part of modern Kyōto Prefecture and the east-central part of Hyōgo Prefecture. 
It and the neighbouring Tango Province were collectively known as . Besides Tango, Tanba bordered on Harima, Ōmi, Settsu, Tajima, Wakasa, and Yamashiro Provinces.
The ancient provincial capital is believed to be in the area of modern Kameoka.
Historical record.
In the 3rd month of the 6th year of the "Wadō" era (713), Tango Province (丹後国) was administratively separated from Tanba. In that same year, Empress Genmei's "Daijō-kan" continued to organize other cadastral changes in the provincial map of the Nara period.
In "Wadō" 6, Mimasaka Province (美作国) was sundered from Bizen Province (備前国); and Hyūga Province (日向国) was divided from Ōsumi Province (大隈国). In "Wadō" 5 (712), Mutsu Province (陸奥国) had been severed from Dewa Province (出羽国).
After being governed by a succession of minor daimyō, the region was eventually conquered by Oda Nobunaga in the Sengoku period. He assigned the province to one of his generals, Akechi Mitsuhide, who would become the central figure in Nobunaga's assassination in 1582.
A town in this region also named "Tanba" was merged with several other towns in 2005 to create Kyōtanba ("Kyō" + "Tanba").