Potassium perrhenate is an inorganic compound with the chemical formula KReO<sub>4</sub>.
Potassium perrhenate can be produced by the neutralization of potassium hydroxide and perrhenic acid.
Potassium perrhenate is a white solid that is sparingly soluble in water and ethanol. It have a tetragonal crystal system with the space group I4<sub>1</sub>/a (No. 88), and lattice constants a = 567.4 pm and c = 1266.8 pm. It is a strong oxidizer.