Count Nanbu Toshiyuki (南部利恭, 18 November 1855 to 19 October 1903) was a Bakumatsu period Japanese samurai, and the 15th and final daimyō of Morioka Domain in northern Japan. He was the 41st hereditary chieftain of the Nanbu clan. Yoshiyuki was elevated to the title of Count (hakushaku) in the kazoku peerage system on 7 July 1884. On 20 June 1902, shortly before his death, he was awarded Senior Third Rank. His grave is at the temple of Gokoku-ji in Tokyo.