Socjaldemokracja Rzeczypospolitej Polskiej (SdRP) was a social democratic political party in Poland created in 1990, shortly after the fall of Communism. The party was the successor party to the Polish United Workers (Communist) Party. SdRP was the leading party of the SLD coalition grouping, formed in 1991. In 1999 SdRP was absorbed into the SLD, which transformed into a unified political party.