P. Viswambharan (25 June 1925 – 9 December 2016) was an Indian politician, socialist, trade unionist and journalist.
P. Viswambharan was elected as the first Convener of the Left Democratic Front (LDF) which was formed in 1973.
In the period of 1975-77 he actively worked against the Emergency declared by the then prime minister Indira Gandhi.
Right from the beginning of the formation of the Coir Co-operative Movement in Thiru- Cochi State (in 1950) he was associated with it as an active leader and organizer.
He also worked as the vice president of Kerala Coir Marketing Federation for a long time.