| Border: | parliamentary |
| Minister: | not_prime |
| Post: | Leader of Opposition of Kerala |
| Insignia: | File: Emblem of Kerala state Vector.svg |
| Insigniasize: | 100px |
| Insigniacaption: | Seal of the Government of Kerala |
| Incumbent: | V. D. Satheesan |
| Incumbentsince: | 22 May 2021 |
| Appointer: | Governor of Kerala |
| Style: | The Honourable |
| Status: | Leader of Opposition |
| Member Of: | Kerala Legislative Assembly |
| Termlength: | 5 years |
| Inaugural: | P. T. Chacko (1957–1959) |
| Deputy: | P. K. Kunhalikutty |
| Seat: | Kerala Niyamasabha |
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 is V. D. Satheesan. V. S. Achuthanandan has served as Leader of the Opposition for 15 years which makes him the longest serving Leader of the Opposition in Kerala Legislative Assembly.
Key
| 1. | E.M.S. Namboodiripad | 2 | 1957-59, 1967-69 | 4 | 1960-64, 1969-70, 1970-77, 1977-78 | |
| 2. | K. Karunakaran | 4 | 1977, 1981-82, 1982-87, 1991-95 | 4 | 1967-69, 1978-79, 1980-81, 1987-91 | |
| 3. | A.K. Antony | 3 | 1977-78, 1995-96, 2001-04 | 1 | 1996-2001 | |
| 4. | P.K. Vasudevan Nair | 1 | 1978-79 | 1 | 1979 | |
| 5. | E.K. Nayanar | 3 | 1980-81, 1987-91, 1996-2001 | 3 | 1981-82, 1982-87, 1991-92 | |
| 6. | Oommen Chandy | 2 | 2004-06, 2011-16 | 1 | 2006-11 | |
| 7. | V.S. Achuthanandan | 1 | 2006-11 | 3 | 1992-96, 2001-06, 2011-16 |
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 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.
| Name | Party | Length of term | No: of terms | |||||
|---|---|---|---|---|---|---|---|---|
| Terms | Total years in office | |||||||
| data-sort-value="1" | 1 | CPI(M) | 1992-96, 2001-06, 2011-16 | 14 years, 65 days | 3 | |||
| 2 | E. M. S. Namboodiripad | CPI(M)/CPI | 1960-64, 1969-70, 1970-77, 1977-78 | 12 years, 220 days | 4 | |||
| data-sort-value="2" | 3 | INC | 1967-69, 1978-79, 1980-81, 1987-91 | 8 years, 118 days | 4 | |||
| 4 | E. K. Nayanar | CPI(M) | 1981-82, 1982-87, 1991-92 | 5 years, 270 days | 3 | |||
| data-sort-value="4" | 5 | INC | 2016-21 | 4 years, 361 days | 1 | |||
| 6 | Ramesh Chennithala | 2006-11 | 4 years, 360 days | 1 | ||||
| 7 | 1996-2001 | 4 years, 358 days | 1 | |||||
| 8 | V. D. Satheesan | 2021 onwards | 1 | |||||
| 9 | P. T. Chacko | 1957-59 | 2 years, 117 days | 1 | ||||
| data-sort-value="8" | 10 | T. K. Ramakrishnan | CPI(M) | 1979 | 60 days | 1 | ||
| data-sort-value="11" | 11 | CPI | 1979 | 51 days | 1 | |||