Namtok Chet Sao Noi National Park (Thai: อุทยานแห่งชาติน้ำตกเจ็ดสาวน้อย) is a national park in Thailand, with a total area of 28 km2 (11 sq mi) covering Amphoe Muak Lek, Amphoe Wang Muang, Saraburi Province and Amphoe Pak Chong, Nakhon Ratchasima Province.