This chapter compares the impact of populist and radical right parties and movements on the politics of Estonia, Latvia, and Lithuania. In Estonia, radical right-wing mobilization, mainly motivated by anti-Russian sentiment and Euroskepticism, has not yet resulted in parliamentary representation. In Latvia, however, the radical right populist party All for Latvia formed an electoral coalition with the more established and moderate nationalist For Fatherland and Freedom/Latvian National Independence Movement party and became part of the governing coalition in 2011. Our study will be the first to assess the impact the party has had on the policymaking of the current Latvian government. Lithuania, in contrast, has several electorally successful populist parties of both the right and left. Their prominence in the Lithuanian case can largely be explained by the lack of the ethnic cleavage, which strongly characterizes the Estonian and Latvian political party system and heavily influences political discourse.