Lusia or Lousia (Greek, Ancient (to 1453);: Λουσία) was a deme of ancient Attica, of the phyle Oeneïs, sending one delegate to the Athenian Boule.[1] Stephanus of Byzantium notes it was named after a heroine named Lusia, a daughter of Hyacinthus the Lacedaemonian.
The deme is attested in inscriptions; one a funerary inscription of a townsperson,[2] another describing the deme's contributions to construction of the Eleusinion.[3]
The site of Lousia is in the Kephisos valley, west of modern Athens.