Tengiz

Tengiz, Teniz (Теңіз; Тениз), 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