K. Sivadasan Nair (born 2 March 1949) is an Indian politician and was a member in the 12th and 13th Kerala Legislative Assembly from Pathanamthitta and Aranmula Assembly Constituencies respectively.
He belongs to the Indian National Congress.
[1] He was born at Aranmula on 2 March 1949.
His father is Kesava Pillai and mother is Ammukkutty Amma.
He is married to Prof. P. R. Lalithamma and has two daughters.