The conflict in the post-Yugoslav space has been given considerable scholarly attention. However, many issues, such as inclusion and exclusion through citizenship and franchise, have been neglected by the mainstream political science. Having this analytical gap in mind, this paper examines the transformations of citizenship and voting rights in the context of party competition, thus adding to Brubaker’s (1992) observations that the image of politics captured in the underlying legislation is not only ideal but also practical. Through its key aims, the paper explores how the different countries define 'insiders' and 'outsiders' in their political spaces. It looks at how the interplay between citizenship and franchise is changed and shaped by party competition in post-Yugoslav space, and contributes to the understanding of how a state’s membership is affected by the interplay between nation-building and EU integration.