The sulfate minerals are a class of minerals which include the sulfate ion (SO₄^2-) within their structure. The sulfate minerals occur commonly in primary evaporite depositional environments, as gangue minerals in hydrothermal veins and as secondary minerals in the oxidizing zone of sulfide mineral deposits. The chromate and manganate minerals have a similar structure and are often included with the sulfates in mineral classification systems. Sulfate minerals include:

• Anhydrous sulfates
  • Barite BaSO₄
  • Celestite SrSO₄
  • Anglesite PbSO₄
  • Anhydrite CaSO₄
  • Hanksite Na₂₂K(SO₄)₉(CO₃)₂Cl
• Hydroxide and hydrous sulfates
  • Gypsum CaSO₄·2H₂O
  • Chalcanthite CuSO₄·5H₂O
  • Kieserite MgSO₄·H₂O
  • Starkeyite MgSO₄·4H₂O
  • Hexahydrite MgSO₄·6H₂O
  • Epsomite MgSO₄·7H₂O
  • Meridianiite MgSO₄·11H₂O
  • Melanterite FeSO₄·7H₂O
  • Antlerite Cu₃SO₄(OH)₄
  • Brochantite Cu₄SO₄(OH)₆
  • Alunite KAl₃(SO₄)₂(OH)₆
  • Jarosite KFe₃(SO₄)₂(OH)₆