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.

Yoshiyuki, together with Nanbu Nobutami, the daimyō of Shichinohe Domain, he surrendered his forces to the new Meiji government on 9 October 1868 during the Boshin War.

However, as Yoshiyasu had actually participated in combat against the Meiji government against the forces of Akita Domain in the war, the appointment was withdrawn only five days later, and on 24 December, his position was abolished and his territories were seized.

His stay in Morioka was short, as with the abolition of the han system in 1871, he was ordered to live in Tokyo, where he founded the Kyōkan Gijuku, a school of western learning, whose students included the noted writer Natsume Sōseki.

His eldest son and heir, Nanbu Toshinaga, was an officer in the Imperial Japanese Army, and was killed in combat during the Russo-Japanese War while serving with the Guards Regiment.