Politicized consumer choice among brands and products is increasingly accepted as a novel mode of nonconventional political participation. However, scholars often overlook developing societies and seldom discuss consumers' perception of the marketplace as a political arena. This study reviews evidence of political consumerism in Latin America, measuring individuals' perceptions of corporations as agents that affect public goods, examining feelings of political efficacy over corporations, and analyzing motivations behind market-based activism. Research is grounded on representative samples of urban adults from Argentina, Brazil, and Mexico. Logistic regression confirms political consumerism as driven by distrust of government and concomitant engagement with politics, suggesting a diversified repertoire of individual political action in Latin America.