This paper aims to analyse the extent to which new political parties in Croatia and Slovenia use populist political communication discourse in social media. This paper focuses on two new parties that entered the parliament in the most recent elections: Živi zid (Human Blockade) in Croatia, and Združena levica (United Left) in Slovenia. The paper will analyse these parties’ political communication on Facebook. The main question guiding the analysis is: to what extent are new parties in Croatia and Slovenia populist in their political communication on Facebook? The method used in the paper will be content analysis, with a Facebook post as a unit of analysis. The content analysis will be performed on posts published over a period of two weeks prior to the general elections (electoral campaigns).