Kolathiri or Kolathiri Rājā (King of Kolathunādu) was the title by which the senior most male along the matrilinieal line of the Mushika or Kolathunādu Royal Family (Kolaswarũpam) was styled. had its seat at Ezhimala in Kerala, India and was one of the major political houses which became prominent in Kerala after the disappearance of the Kulasekharas or Perumāl rulers of Mahodayapuram by the twelfth century AD.
"Kolathiti" appears as a character in a Malayalam film titled Urumi. The film is based on a fictional story about a young Indian who tried to kill Vasco da Gama. The movie was released on 31 March 2011.
- Duarte Barbosa, The Book of Duarte Barbosa: An Account of the Countries Bordering on the Indian Ocean and their Inhabitants, II, ed.M. L Dames (repr., London: Hakluyt Society, 1921)
- The Dutch in Malabar: Selection from the Records of the Madras Government, No. 13 (Madras: Printed by the Superintendent, Government Press, 1911), 143.
- Perumals of Kerala by M. G. S. Narayanan (Calicut: Private Circulation, 1996)