Is religion still an important factor affecting vote choice in spite of the secularization processes? This study aims at assessing the effects of religiosity on vote choice in Poland, a country of very strong Catholic tradition that has only started to experience secularization and one of the few countries in which religiosity is associated with voting for populist radical right parties. We argue that, contrary to what is happening in Western Europe, in Poland, the decreasing levels of religiosity in the context of a growing presence of politicized religious or moral issues in the public sphere and high political influence of the Catholic Church amplify the importance of religion as a determinant of voting. Using Polish National Election Study data from 1997 to 2019, we show that the public aspects of religiosity (church attendance and the activation of conflicts by ecclesiastical and political elites) related to feelings of belonging affect voting to a greater degree than the more personal dimension of religious belief. In this study, we conceive political parties as social coalitions (Bawn et al. 2012) and, thus, we also emphasize the role of religious interest groups and activists, particularly in the case of the governing Law and Justice party. We conclude by discussing the implications and generalizability of these findings to other contexts in search of explanations to the paradox of the continuity of the influence of religion on voting regardless of the secularization processes.