Caesium tungstate or cesium tungstate is an inorganic chemical compound that is notable for forming a very dense liquid in solution.

Caesium tungstate forms colorless crystals, which are strongly hygroscopic.

A phase transition from orthorhombic to hexagonal crystal system occurs at 536 °C.

Caesium tungstate can be obtained by the reaction between caesium chloride (CsCl) and silver tungstate (Ag2WO4) or the reaction between tungstic acid and caesium hydroxide.

This inorganic compound–related article is a stub.