Potassium hexafluorocuprate(III) is an inorganic compound with the chemical formula K<sub>3</sub>CuF<sub>6</sub>. It is a green paramagnetic solid, a relatively rare example of a copper(III) compound.
The compound is prepared by oxidizing the mixture of potassium chloride and cuprous chloride with fluorine:
A variety of analogues are known. The compound reacts with water easily, producing oxygen and copper(II) products.