Erechtheis (Ancient Greek: Ἐρεχθηΐς) was a phyle (tribe) of ancient Attica with fourteen demes.
The demes were Agryle (Upper and Lower), Euonymon, Themakos, Anagyrous, Kedoi, Lamptrai (Upper and Coastal), Pambotadai, Kephisia, Pergase (Upper and Lower), Phegous, Sybridai.
Critias is thought, hypothetically, to have belonged to this phyle, but it is uncertain as to the veracity of this claim.