Cobalt(II) sulfate is the inorganic compound with the formula CoSO₄. It is the divalent cobalt salt of sulfuric acid. The most common form of cobalt sulfate are the hydrates CoSO₄^.7H₂O and CoSO₄^.H₂O. Cobalt(II) sulfate and its hydrates are some of the most commonly available salts of cobalt.