The Praja Socialist Party, abbreviated as PSP, was an Indian political party that was active between 1952 and 1972. It was founded in 1952 when the Socialist Party, led by Jayaprakash Narayan, Rambriksh Benipuri, Acharya Narendra Deva and Basawon Singh (Sinha), merged with the Kisan Mazdoor Praja Party led by J. B. Kripalani.