Nanbu Yukinobu (南部行信, 11 September 1642 – 29 November 1702) was an early to mid-Edo period Japanese samurai, and the 4th daimyō of Morioka Domain in northern Japan. He was the 30th hereditary chieftain of the Nanbu clan. His courtesy title was Shinano-no-kami, and his Court rank was Junior Fifth Rank, Lower Grade, later raised to Junior Fourth Rank, Lower Grade. Yukinobu was born in Morioka as the eldest son of Nanbu Shigenobu, and was received in formal audience by shōgun Tokugawa Ietsuna on 28 April 1664. On 27 June 1692, on the retirement of his father, he became daimyō of Morioka Domain.