Norwegian Social Democratic Party (1814: Norwegian Independence)

The Norwegian Social Democratic Party (Landsmål: Noregs Sosialdemokratiske Parti, NSP) was a Social Democratic and Anti-communist political party in Norway, formed in 1922. The party was formed in opposition to the radicalization of the Labour Party, and the party's membership in Comintern.

In the late 1920s, the party managed to gain representation in the Parliament, weakening the Labour Party in the process. Unlike the Labour Party at the time, was the Social Democrats willing to work with the Separatists, and there where cooperation between Social Democrats and Liberals.

The NSP saw its end in 1932, when it chooce to unite into the Labour Party. At this time, the Labour Party had moderated itself.