Potassium hexafluororhenate is an inorganic chemical compound with the chemical formula K2ReF6.

[2] The compound can be prepared by reacting K2ReI6 with potassium fluoride, hydrogen iodide mixture.

[3] Also it can be formed by reacting K2ReI6 or K2ReCl6 with KHF2.

[4] The compound forms pale pink crystals of the trigonal system, space group P3m1.

[5][1] The crystals are of K2GeF6-type.