There has been much scholarly attention for the radical right, especially in political science. Unfortunately, this research pays less attention to the discourse of the radical right, a topic especially studied by scholars in discourse studies. Especially lacking in this research in various disciplines is a theoretically based analysis of ideology. This Element first summarizes the authors theory of ideology and extends it with a new element needed to account for the ideological clusters of political parties. Then a systematic analysis is presented of the discourses and ideologies of radical rights parties in Chile, Spain, the Netherlands and Sweden. From a comparative perspective it is concluded that radical right discourse and ideologies adapt to the economic, cultural, sociopolitical and historical contexts of each country.