Polonium(IV) sulfate is an inorganic compound, a salt of polonium and the sulfate anion with the chemical formula of Po(SO4)2.

As anhydrous, it forms dark purple crystalline solid, and as a hydrate, it forms colourless or white crystals, and is soluble in water.

It can be obtained by the reaction of polonium tetrachloride (or hydrated polonium dioxide)[1] and sulfuric acid.

[2] Polonium(IV) sulfate can be reduced to PoSO4[3] by hydroxylamine in acidic solutions; it decomposes to polonium dioxide at 550 °C.

It is radioactive and produces gases as it decays.