The literature on authoritarianism and exclusive forms of nationalism often implies that authoritarian and exclusive-nationalist individuals will prefer radical right-wing populist parties such as Austria's FPÖ. The theoretical case for such implications appears sound as party programmes for radical right-wing populist parties invoke rhetoric that should appeal to individuals with either of these characteristics. To date, these implications have not been examined. This article examines quantitative survey data from five Western European countries with electorally viable radical right-wing populist parties to determine whether radical right-wing populist parties are preferred by authoritarians and/or exclusive-nationalists. Analyses indicate that the radical right-wing populist parties studied here are consistently preferred by exclusive-nationalist individuals, though not necessarily to all other parties, but only inconsistently preferred by authoritarian individuals. While more nuanced investigation is still needed, it is clear that, contrary to the assumptions in the authoritarianism literature, radical right-wing populist parties cannot always rely on authoritarian individuals for support.