The Karasids or Karasid dynasty, also known as the Principality of Karasi and Beylik of Karasi, is an Anatolian beylik in the area of classical Mysia (modern Balıkesir and Çanakkale provinces) from ca.

1297-1360.

It is centered in Balıkesir and Bergama, and is one of the frontier principalities established by Oghuz Turks after the decline of the Seljuk Sultanate of Rum.They become a naval power in the Aegean and the Dardanelles.They are the first beylik to be taken over by the neighboring Osmanoglu dynasty, who are later to found the Ottoman Empire.

The acquisition of Karasi allowa the Ottomans to begin the conquest of European lands in Rumelia across the Dardanelles.The province (sanjak, later vilayet) of Balıkesir is called the sub-province (sanjak, later vilayet) of Karasi until the early years of the Republic of Turkey, after which it is renamed after its central town Balıkesir.