Minami Bōsō Quasi-National Park (南房総国定公園, Minami-Bōsō Kokutei Kōen) is a quasi-national park in the Kantō region of Honshū in Japan.

It is rated a protected landscape (category V) according to the IUCN.

[2] The park includes numerous widely separated portions of the coastal areas of southern Bōsō Peninsula, ranging from Cape Futtsu on Tokyo Bay to the west, to Cape Inubō facing the Pacific Ocean in the east.

[3] With the location of the park near to the Tokyo Metropolis, and its mild climate, the area attracts many visitors for water sports, camping, and flower viewing.

[1] Minami Bōsō Quasi-National Park includes parts of nine jurisdictions in Chiba Prefecture.