Sire is a form of address for reigning kings in the United Kingdom and in Belgium.

Sire may also refer to:

• Father, particularly in animal breeding, especially a horse
  • See also: Stallion
• James W. Sire (1933–2018), author on worldviews
• Sire (novel), a 1991 novel by Jean Raspail
• Sire Records, a record label
• Sire, Arsi, a town in southeastern Ethiopia
• Sire, Welega, a town in southwestern Ethiopia
• Sire (woreda), a district in Oromia Region, Ethiopia
• Sire, in the table-top RPG The Masquerade, the vampiric creator of another vampire
• Sire Guitars, a company whose products include Marcus Miller signature bass guitars

• Tutcheria
• Tutcheria virgata
• Tutcher's maple
• Tutchi
• Tutchi-ye Olya
• Tutchone
• Tutchone (disambiguation)
• Tutchone people
• Tutdar
• Tutdar-e Molla
• Tutdar-e Ruteh
• Tutear
• Tut-e Chehreh
• Tut-e Do
• Tute Genomics
• Tut-e Gurkash
• Tuteh Chal
• Tuteh Chay
• Tutehcheh
• Tutejsi (disambiguation)
• Tutekan
• Tut-e Khowshadul
• Tut-e Khuri
• Tut-e Khvoshadul
• Tutekohi Rangi