Myōkō-Togakushi Renzan National Park is a national park in Niigata Prefecture and Nagano Prefecture, Japan. Established in 2015, and formerly part of Jōshin'etsu-kōgen National Park, the park comprises an area of 39,772 ha in the municipalities of Itoigawa and Myōkō in Niigata Prefecture and Iizuna, Nagano, Otari, and Shinano in Nagano Prefecture.