The neologism “mansplaining” captures an insidious dynamic in which men explain things to women that women already understand, assuming that, by virtue of being a woman, she lacks the man’s knowledge. Mansplaining has started to receive some attention in contemporary scholarship, conceptualizing the phenomenon and identifying its epistemic harm. My purpose is to consider mansplaining and its harms from the perspective of democratic theory. Setting the problem of mansplaining against the norms we expect of democracy—equality, inclusion, and recognition—I argue that mansplaining poses harms that are not only individual and epistemic but also collective and relational. I distinguish two types of mansplaining based on women’s expertise and experience to elaborate on its collective epistemic harms to decision making and its relational harm of political exclusion. Mansplaining poses further relational harms of inequality and misrecognition, undermining the equal social relations and social trust required for deliberation.