Zaō Quasi-National Park is a Quasi-National Park that extends in the Ōu Mountains between Miyagi and Yamagata Prefectures, Japan. Established in 1963, the central feature of the park is Mount Zaō. It is rated a protected landscape according to the IUCN. Like all quasi-national parks in Japan, the park is managed by the local prefectural governments, in this case, that of Yamagata and Miyagi prefectures.