Kurisinkal Sebastian Manoj (born 19 April 1965) is an Indian politician and physician.

He hails from Kerala and was a Member of Parliament for the 14th Lok Sabha, representing Alappuzha Lok Sabha constituency as a Communist Party of India (Marxist) (CPI(M)) candidate.

He contested the 2009 Lok Sabha elections again from the same constituency, losing to Indian National Congress (INC) candidate K. C. Venugopal.

He resigned from CPI(M) on 9 January 2010, citing that the line of the party clashed with his religious beliefs.

[2] A rectification document produced by the party in 2009 had barred any member from practising one’s religion and affirming one’s belief in God.