Kolathiri or Kolathiri Rājā (Kannada:[koːlɐt̪ːiɾiɾaːdʒaː]) (King of Kolathunādu or King of Cannanore in foreign accounts) was the title by which the senior-most male along the matrilineal line of the Kolathunādu Royal Family (Kolaswarũpam) based in the North Malabar region was styled. Kolathiri belongs to the Mushika dynasty, they were historically part of the Nair community.

Cult of Samantan classral depictions

Kolattiri Raja's minister Kuruppu's Arabic letter to Vasco da Gama (1524)

"Kolathiri" appears as a character in a Malayalam film titled Urumi. The film was loosely based on Portuguese interference in north Kerala and the misdeeds committed by Vasco da Gama, who was hailed as a hero in the west but was actually a cold-hearted tyrant to other lands of the spice route; his entry into Kerala politics and manipulating the kingpins and a young Indian who tries to kill Vasco da Gama. The movie was released on 31 March 2011.