Matsudaira Nobutoki (松平 信祝, December 23, 1683 – May 29, 1744) was a daimyō during mid-Edo period Japan.
On the death of his father on June 18, 1709, he became daimyō of Koga Domain and head of the Ōkōchi-branch of the Matsudaira clan.
On July 12, 1712, he was transferred to Yoshida Domain in Mikawa Province, with a rise in revenues to 70,000 koku.
On July 11, 1730, he was elevated to the rank of Rōjū in the service of Shōgun Tokugawa Yoshimune.
Matsudaira Nobutoki was married to a daughter of Sakai Tadataka, the daimyō of Maebashi Domain.