Despite the rising electoral success of independent local parties in many European countries, empirical evidence about their members is still rare. Therefore, the study aims to answer three questions to reach new insights: Who are these members? Which incentives motivate them to join, and how is intra-party participation structured? Based on a cross-sectional postal survey in Germany, the results show that members of independent local parties and national parties have mostly the same socioeconomic background and thus differ from the average general population. Independent local party members join their organisations mainly to promote an apolitical style of local decision-making and facilitate local democracy. Within independent local parties, different types of participation are present; while some members are fully engaged, others are mainly involved as elected representatives in public office or interested in social exchange. The interplay of membership incentives, civic skills and individual resources explains the variation of intra-party participation, whereby membership incentives are the most powerful explanatory factor. This study shows that independent local parties represent an alternative for those who have joined national parties, to date. Thus, they provide an essential linkage between citizens and the (local) political system.