松本藩
was the 2nd Matsudaira "daimyō" of Matsumoto Domain and 7th hereditary chieftain of the Toda-Matsudaira clan. His courtesy title was "Tamba-no-kami". Mitsuo was the fifth son of Matsudaira Mitsuhiro and was born at Yodo Castle. In 1732, he was posthumous adopted as heir by his elder brother, Matsudaira Mitsuchika and was received in formal audience by Shōgun Tokugawa Yoshimune. In 1735, the authority to issue travel permits to women passing through official checkpoints at the Usui Pass and Fukushima-juku on then Nakasendō highway was restored to Matsumoto Domain. In 1743, the shogunate abolished its "jin'ya" at Shiojiri and placed the 159 "tenryō" villages with a "kokudaka" of 53,290 "koku" under the administration of Matsumoto Domain, although subsequently (in 1788), Naka-no-jō "jin'ya" was established to administer 13,000 "koku" of this territory. His wife was a daughter of Satake Yoshimune of Kubota Domain. He died at the clan's Gofukubashi residence in Edo in 1756 at the age of 41.