Despite extensive research on electoral turnout in developed democracies, we know relatively little about the determinants of electoral participation in (electoral) autocracies. Yet, electoral mobilization is crucial to understanding electoral authoritarian regime dynamics and democratic regression. This article studies the ‘socioeconomic roots’ of electoral authoritarianism by using original local-level data from a prominent contemporary electoral authoritarian regime, Russia. The article shows how the electoral mobilization of certain institutionally and socioeconomically state-dependent demographic sectors was a key part in Russia’s transition from a competitive to hegemonic authoritarian regime between 2000 and 2004. An original local-level data set allows us to test the hypotheses using multilevel models, controlling for several socioeconomic and contextual variables at both regional and local levels. The results support the hypotheses of electoral mobilization in specific demographic areas and show interesting variations in turnout patterns between the subnational units.