The post of Leader of the Opposition in the Kerala Legislative Assembly has been held by 11 politicians since the Assembly was established in 1957. All have belonged to either the Indian National Congress, the Communist Party of India or the Communist Party of India (Marxist). The current Leader of the Opposition, since May 2021, is V. D. Satheesan. V. S. Achuthanandan has served as Leader of the Opposition for 15 non-consecutive years which makes him the longest serving leader of the opposition in Kerala Legislative Assembly.
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E.M.S. Namboodiripad, A.K. Antony, E.K. Nayanar, Oommen Chandy and P.K. Vasudevan Nair first served as Chief Ministers before occupying the post of Leader of the Opposition.
K. Karunakaran and V.S. Achuthanandan served as Leader of the Opposition before donning the mantle of Chief Ministership.
P.T. Chacko, T.K. Ramakrishnan, Ramesh Chennithala and incumbent Leader of the Opposition V.D. Satheesan have not served as Chief Minister. Conversely, Pattom A. Thanu Pillai, R. Sankar, C. Achutha Menon, C. H. Mohammed Koya and incumbent Chief Minister Pinarayi Vijayan have not served as Leader of the Opposition.