Boutheia (Ancient Greek: Βούθεια) or Bouthia (Βουθία) was a town of ancient Ionia, near Erythrae. It was a member of the Delian League since it is mentioned in tributary records of Athens at least between the years 454/3 and 427/6 or 426/5 BCE. In some of these records it appears as part of the territory of Erythrae.
- Stephanus of Byzantium. Ethnica. Vol. s.v.
- Mogens Herman Hansen & Thomas Heine Nielsen (2004). "Ionia". An inventory of archaic and classical poleis. New York: Oxford University Press. p. 1064. ISBN 0-19-814099-1.
- Richard Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World. Princeton University Press. p. 56, and directory notes accompanying.
- Lund University. Digital Atlas of the Roman Empire.