The Mezhraiontsy (Russian: межрайонцы, IPA: [mʲɪʐrɐˈjɵnt͡sɨ]), usually translated as the "Interdistrictites,"[1] were members of a small independent faction of the Russian Social Democratic Labor Party (RSDLP), which existed between 1913 and 1917. Although the organization's formal name was the Russian Social Democratic Labor Party (Internationalists), the names "Mezhraionka" for the organization and "Mezhraiontsy" for its participants were commonly used to indicate the group's intermediate ideological position between the rival Menshevik and Bolshevik wings of the divided RSDLP.
The Mezhraiontsy merged with the Bolsheviks during the Russian Revolution of 1917.