Rhizus

Rhizus or Rhizous (Greek: Ριζούς (ο)) was a town and polis of Magnesia in ancient Thessaly, whose inhabitants were transported by Demetrios Poliorketes to Demetrias upon the foundation of the latter city. We learn from Periplus of Pseudo-Scylax that Rhizus was outside the Pagasaean Gulf upon the exterior (Aegean) shore. In Strabo's time, it was a village dependent on Demetrias. Coins minted by Rhizus have been found, dated in the 4th century BCE.

Rhizus may also refer to Ριζαίον on the Black Sea, modern Rize.

The site of Rhizus is at the modern village of Tarsanas (Ταρσανάς).