Teichiussa or Teichioussa () was a town of ancient Caria or of Ionia in the territory of Miletus, and according to Thucydides, Athenaeus and Stephanus of Byzantium, a possession of the latter city. Archestratus called it a village of Miletus. It was a polis (city-state) and a member of the Delian League. During the Peloponnesian War, the Spartans struck at Iasos from here.
Its site is located near Kazñklñ, Asiatic Turkey.