The Royalist Social Democrats (Hul: Königstreue Sozialdemokraten; Gao: Roiyaru Shakaiminshu; Abbr: KSD) is a social democratic political party in the Imperial Crownlands of Hulstria and Gao-Soto. The party operates nationally under the KSD name in the dual monarchy, as well as locally in both Hulstria and Gao-Soto.