Leuconoe or Leukonoe (Ancient Greek: Λευκονόη), or Leuconoeum or Leukonoion (Λευκόνοιον), or Leukonefs (Λευκονοιεύς) was a deme of ancient Attica of the phyle of Leontis.

Its site is tentatively located near modern Peristeri.

People

• Demochares, a leading Athenian politician in 307-302 BCE.