Abstract As conspiracy theories have become a popular form of political discourse worldwide, states have promoted conspiratorial ideas to advance their foreign policy goals. Yet, despite recent attention to the spread of propaganda abroad, scholars have not addressed whether and how conspiracy theories spread across borders. This study assesses this question in the post-Soviet region, by examining the relationship between exposure to Russian state propaganda and belief in conspiracy theories in two countries that border the Russian Federation. Analyzing data from an original survey of Georgia and Kazakhstan indicates that exposure to Russian propaganda through television, social media, or websites has minimal effects on respondents’ endorsement of conspiracy theories. Respondents in Kazakhstan, and especially ethnic Russians, are likely to endorse pro-Russian conspiracy claims that are frequently propagated, owing to preexisting affinities. Yet the most consistent predictor of conspiracy beliefs is alienation from the political system, which occurs independent of foreign media consumption. The findings cast doubt on the ability of states to shape the attitudes of citizens abroad through the media and shine light on the domestic political factors underlying belief in conspiracy theories.