Siyâvash (Persian: سیاوش) is an Iranian legendary prince, and a major figure in Ferdowsi's epic the Shahnameh.

Siyavash, or Siavash, or other transliterations, may also refer to:

• Siavash (name)
• Siyavash (film) [fa], an Iranian film
• Siyavash (opera) [fa], an Iranian opera by Loris Tjeknavorian
• Siyavush (play), an Azerbaijani play
• Siyavash (video game) [fa], an Iranian video game
• Siyavash, Nishapur [fa], a village in Nishapur County, Razavi Khorasan province, Iran
• Siyavash sniper rifle, an Iranian rifle

• All pages with titles containing Siavash
• All pages with titles containing Siyavash
• All pages with titles containing Siyavush
• All pages with titles containing Siyawush
• Siyavuş Pasha (disambiguation), several Ottoman persons