The Socialist Party of New York is the name of two distinct, but historically related state affiliates of the American socialist movement located in New York state. Emerging from a July 1899 split in the Socialist Labor Party of America, the organization existed first as the Social Democratic Party of New York, retaining that name even after the founding of the Socialist Party of America (SPA) in the summer of 1901. A presence was maintained in the state as the Socialist Party of New York for the next seven decades.