Conthyle or Konthyle (Greek, Ancient (to 1453);: Κονθύλη) was a deme of ancient Attica, originally of the phyle of Pandionis, but after 224/3 BCE of the phyle of Ptolemais, sending one delegate to the Athenian Boule.[1] There was an association among Conthyle, Cytherus, and Erchia.
Its site is located southeast of modern Spata.