Siwa may refer to:

• Siwa, Indonesian pronunciation of the Hindu god Shiva
• Siwa (genus), spider genus in the Araneidae
• Šiwa, Slavic goddess of fertility
• Siwa Oasis, oasis in Egypt
• 140 Siwa, asteroid

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.