Although there are numerous contributions on ethnic electoral politics, relatively little research has been devoted to explain the scope of success of ethnic minority parties. This article addresses the issue within the bounds of post‐communist Europe, paying particular attention to the effect of cultural legacies. It was confirmed, first of all, that ethnic parties are likely to emerge only if their titular minority has a number of voters larger than what is necessary to obtain parliamentary representation. Otherwise, the most successful were the ethnic parties representing the minorities characterised by legacy of regional domination, that is, those whose members had once enjoyed a dominant position as a ruling nation on a given territory (e.g. Hungarians in Slovakia). The second‐successful were the parties representing homeland minorities, that is, those which have resided on a given area for more than two centuries, but have never been members of a ruling nation. The parties representing diaspora or immigrant minorities were the least successful. Further research could assess the importance of these factors in other regions of the world.