Tsosib Sumkyil (Tibetan: ཚོ་སྲིབ་གསུམ་དཀྱིལ, Wylie: tsho srib gsum dkyil, THL: tso sip sum kyil) or Churup Sumkhel (Tibetan: སུ་རུ་གསུམ་འཁྱིལ, Wylie: su ru gsum 'khyil, THL: su ru sum khyil) is the westernmost township of the Zanda County in the Ngari Prefecture, Tibet region of China.

Tsosib (Tibetan: ཚོ་སྲིབ, Wylie: tsho srib, THL: tso sip, also spelt Tsosip, Cosib and Cosip) or Churup (Tibetan: སུ་རུ, Wylie: su ru, THL: su ru, also spelt Tsurup) is a border village on the bank of Pare Chu just before the river enters the Indian Spiti district (32°06′47″N 78°42′41″E / 32.1131°N 78.7114°E / 32.1131; 78.7114 (Tsosib)).

Sumkyil or Sumkhel (Tibetan: གསུམ་དཀྱིལ, Wylie: gsum dkyil, THL: sum kyil or Tibetan: གསུམ་འཁྱིལ, Wylie: gsum 'khyil, THL: sum khyil, also spelt Sumkyi, Sumgyi, Somgyi and Sonjie) is a farming village on a tributary of Pare Chu called Sumkyil Chu.

During the border talks between China and India in 1960, the Indian delegates presented evidence of the region being under Ladakhi control during the reign of Nyima Namgyal (r. 1691–1729).

Mentioned in the records were the villages of Kaurik, Gue (Gyu), Shaktot, Tsurup, Sumkyil, Kharak and Bargyok (Berchok).