This study develops and tests two arguments for how repertoires of political action are reconfigured in postcommunist Romania. Using multivariate statistical analysis, it examines whether citizens' engagement in postcommunist politics is linked with generic socioeconomic and attitudinal traits or alternatively, it is connected with selective mobilization opportunities provided by social networks and organizations. The findings reveal that while most Romanians are politically inactive two decades after the fall of communism, those who engage in politics do it selectively and their political action repertoires are largely influenced by four mobilizing agents: trade unions, political parties, social networks and civil society organizations. The literature on post-communist politics generally points out a stark contrast between the effervescence of social movements that led to the collapse of the communist regimes and the relative apathy after the establishment of democracy (Letki 2003). While democratic theory posits that political engagement plays an important role in the equal representation of citizens' needs and preferences in the democratic political processes, post-communist citizens seem to be increasingly estranged from politics. Thus, the identification of factors shaping how and how much citizens participate in the political sphere is important (Johann 2012) as it points to the underlying sources of political apathy in the region. However, research on post-communist 'repertoires' of political participation in Central and Eastern Europe (CEE) is insufficient and this hampers our understanding of the functioning and persistence of democracy in this region. A frequent finding in the political behaviour literature is that citizens of eastern European countries participate less in politics than their western neighbours (Bernhagen & Marsh 2007). But is this difference simply a matter of degree of citizen participation? Or do post-communist citizens and their western counterparts also differ in their understanding of what political participation means and how they combine various structural