Tengiz, Teniz (; ), or Tengis is a Turco-Mongol word meaning sea.
It may refer to: Tengiz Lake, a lake in Akmola Region, Kazakhstan Tengizi Islands, an island chain sited within Lake Tengiz Tengiz Field, an oil field in Atyrau Region, Kazakhstan Teniz, Kamysty District, a lake in Kostanay Region, Kazakhstan Teniz, Mendykara District, a lake in Kostanay Region, Kazakhstan Teniz, Yereymentau District, a lake in Akmola Region, Kazakhstan Tengis River, a river in Mongolia Tengiz (given name), a Georgian given name
See also Tenis