DAOY may refer to:

• DAOY (biology)
• El Bayadh Airport, airport code in Algeria

• Troféu Brasil de Atletismo
• Troféu Crédito Agrícola
• Trogarzo
• Trogen Railway
• Trogga
• Troggs tapes
• Trogiidae
• Trogium
• Trogium pulsatorium
• Trogloarctus
• Trogloarctus trionyches
• Troglobitic fish
• Troglocoelotes
• Trogloctenus
• Troglodiplura
• Troglodiplura lowryi
• Troglodyte (Dungeons and Dragons)
• Troglodytes (Dungeons and Dragons)
• Troglodytes (genus)
• Troglodytes (wren)
• Troglohyphantes iulianae
• Troglohyphantes lucifuga
• Troglohyphantes nigraerosae
• Troglohyphantes vignai
• Troglojapyx hauseri