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 James W. Sire (1933–2018), author on worldviews Sire Gaines (born 2006), American football player 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 Vampire: The Masquerade, the vampiric creator of another vampire

See also Albio Sires, American politician Dave Sires, American politician Sires' Produce Stakes (disambiguation), the name of several different horse races