To understand populism, it is crucial to understand populist political communication. We investigate how politicians across the political spectrum employ populist communication in different non-institutionalized communication arenas. Populism is defined as a thin ideology and three dimensions of populist communication are distinguished: people-centrism, anti elitism, and exclusion. We analyze politicians’ statements in talk shows and social media (Twitter and Facebook) in four Western democracies. The Analysis shows that populist communication is context-dependent and that the use of the three dimensions varies across political systems, media channels, and party types.