The main purpose of this analysis was to determine whether the methods used by Stjepan Radić to translate his political ideas to voters, as well as he as a politician, can be considered populist. Even though personal life and career of Stjepan Radić are very well covered in the literature written by authors both from the Balkan and wider regions, there is not a lot of literature dealing with this aspect of it. Therefore, the goal of this paper was to prove whether Stjepan Radić indeed was a populist, as well as to place his political actions within various divisions within the concept of populism. This was done by analyzing the terminology of populism and elaborating on all the divisions Radić was going to be placed into in the first part of the paper. To be able to do so, the second part of the paper analyzes in detail the political acts of Stjepan Radić, from his youth and university days to his actions during the Habsburg rule, all the way until the political instability within the Kingdom of Serbs, Croats, and Slovenes in the second part of the 1920s, while highlighting the events in which his populism was most clearly shown. By analyzing the mentioned, we can state with certainty that Radić indeed was a populist, as well as that populism was an important part of his ideology, as were liberalism and democratism. This allows us to consider Radić, one of the key figures of Croatian politics from the 20th century, in a different light, which could help any future similar analyses to study him from a somewhat different angle.