The Aydinids or Aydinid dynasty (also known as the Principality of Aydin and Beylik of Aydin (), was one of the Turkish Anatolian beyliks and famous for its seaborne raiding.
The Aydinids also held parts of the port of Smyrna (modern ðzmir) all through their rule and all of the port city with intervals. Especially during the reign of Umur Bey, the sons of Aydñn were a significant naval power of the time.