Ayyash may refer to:

• Yahya Ayyash, Palestinian, member of Hamas
• Ayyash, Iran, a village in Khuzestan Province, Iran

• Acting Superintendent's Headquarters
• Acting troop
• Acting troupe
• Acting Up
• Acting Warrant Officer Class 2
• Acting Warrant Officer Class I
• Acting Warrant Officer Class II
• Acting Wing Commander
• Acting Witan of Mercia
• Actinia
• Actinia aurora
• Actinia bermudensis
• Actinia cari
• Actinia mediterranea
• Actinia tuberculosa
• Actinic lighting
• Actinic rays (disambiguation)
• Actinide chemistry
• Actinides chemistry
• Actinidia anionic protease
• Actinidia melanandra
• Actinidia melandra
• Actinidia oregonensis
• Actinidia rubus
• Actinioidea