Acanthus (plural: acanthus, rarely acanthuses (English) or acanthi (Latin)) may refer to:

• Acanthus (genus), in botany, is both a common name and a genus of flowering plant

• Acanthus (ornament), in architecture

• Stylized acanthus leaf patterns are a common design in leather carving.

• Acanthus, Ontario

• Acanthus (city), the name of an ancient Greek city

• Acantha was a nymph in Greek mythology, associated with the acanthus plant. He had a sister named Acanthis.