Arsenic sulfide may refer to:

• Arsenic trisulfide, As₂S₃, the mineral orpiment
• Arsenic pentasulfide, As₂S₅, similar structure to phosphorus pentasulfide (β-P₂S₅)
• Tetraarsenic tetrasulfide, As₄S₄ (2 isomers):
  • the mineral realgar
  • the mineral pararealgar
• Tetraarsenic trisulfide, As₄S₃, the mineral α- or β- dimorphite