Siyi (disambiguation)

• Siyi or Si Yi 四邑, ("Four Counties"), is a region in southern Guangdong province

Siyi may also refer to:

• Siyi dialect 四邑方言, a branch of Yue Chinese spoken in Sze Yup
• Siyi (Four Barbarians) 四夷, a historical term for all non-Chinese peoples
• Four Arts or Siyi 四藝, artistic accomplishments for a Chinese scholar-bureaucrat