Thapa (; IAST:Thāpā) is a family name or surname used by Nepalese belonging to both Magar caste within Khas people of Indo-Aryan group and Magar caste of Sino-Tibetan group. Kshetri/Chhetri Thapas are addressed as Thapa Kajis or elite Thapas while Thapa Magars are addressed as general Thapa Magars or Thapas in Nepal.