Objective. The study investigates the relationship between perceived loneliness and the individuals' attitude whether voting is a civic duty. With that, it is the first study to shed light on the mechanism linking perceived loneliness to voting behavior. Methods. Two independent, cross-sectional, and representative datasets from Germany (n = 1641) and the Netherlands (n = 1431) are analyzed. Results. The regression results and effect decomposition techniques show that loneliness is associated with reduced intention to vote as well as a lower sense of duty to vote. The effect of loneliness on voting behavior is partially mediated through a reduced sense of duty. Conclusion. Loneliness is associated with political disengagement. The study provides empirical evidence that the relationship between loneliness and turnout is partially mediated through sense of duty. This showcases that lonely individuals tend to feel detached from society and are less likely to feel obligated to participate in the electoral process.In the last few years, scientific insights and repeated media reports about concerning levels of loneliness in Western democracies has drawn attention to the question as to whether loneliness should be a more prominent topic for policymakers (Yang, 2019;Easton, 2018). While research concerned with the negative outcomes of prolonged loneliness is mostly focused on questions of public health (Holt-Lunstad, Smith, and Bradley Layton, 2010;Leigh-Hunt et al., 2017), other outcomes of societal interest such as its influence on policy compliance or political participation were mostly ignored. However, as many scientists suspect that loneliness is rising in modern societies, an eroding impact of loneliness on outcomes such as political participation might become increasingly relevant in the future.This study builds on two theoretical perspectives. First, studies of subjective loneliness highlight that a sense of detachment from peers and society is a central aspect of the loneliness experience (Bower, Conroy, and Perz, 2018;Rokach, 2014;Stein, 2017). Second, political studies have established that perceived sense of duty to vote is a major predictor for voter turnout, which stems from feelings of loyalty and general attachment to the community (Blais and Galais, 2016). Combining both lines of research, this paper investigates whether loneliness is associated with a decrease in sense of duty to vote, a major predictor for voter turnout, as well as reported voting behavior.