The Karasids or Karasid dynasty (Ottoman Turkish: قرا صي; Turkish: Karesioğulları Beyliği), also known as the Principality of Karasi and Beylik of Karasi (Karasi Beyliği or Karesi Beyliği ), was an Anatolian beylik in the area of classical Mysia (modern Balıkesir and Çanakkale provinces) from ca. 1297–1345. It was centered in Balıkesir and Bergama, and was one of the frontier principalities established by Oghuz Turks after the decline of the Seljuk Sultanate of Rum.
They became a naval power in the Aegean and the Dardanelles.