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