Serb Independent Party (Serbian Latin: Srpska samostalna stranka, SSS, German: Serbische selbständige Partei), also known as Serb Autonomous Party or simply Serb Autonomists, was an ethnic Serb political party in the Kingdom of Croatia-Slavonia, under the Austro-Hungarian Empire. It was established in August 1881, in Ruma, by Pavle Jovanović and other affluent Serbs. In 1903 Svetozar Pribićević (1875-1936) became the party leader. They published Srbobran, which was the party organ. The party advocated for the unification of Lika, Kordun, Banija, Dalmatia, Slavonia and Bosnia and Herzegovina with Serbia to form a Greater Serbia. It was later one of the key members of the Croat-Serb coalition (formed in 1905).
It was formed by the Serbs of Croatia in response to the merging of the Military Frontier, inhabited by the Serbs, back into the Kingdom of Croatia.
The party at first worked in concert with the Hungarian interests in Croatia, led by ban Károly Khuen-Héderváry. In 1903, however, under its new leader Svetozar Pribićević it started to collaborate with Croatian parties. It eventually merged into the Croat-Serb Coalition in 1905.