The Indian Socialist Party was a political party in the Indian state of Kerala.
[1] ISP was founded in May 1969, by the majority of the erstwhile Kerala Samyukta Socialist Party (a splinter group of the Samyukta Socialist Party).
[2] The two KSSP ministers in the state government, P. K. Kunju and P. R. Kurup, became members of ISP.
[3] The ISP declared that it sought to become an All India party in six months.
[4] ISP had two ministers in the C. Achutha Menon cabinet formed in October 1969, O. Koran and N.K.