["Philosophy &Public Affairs, EarlyView. ", "\nABSTRACT\nI argue that indoctrination undermines voter competence, and that widespread indoctrination thereby compromises the legitimacy of otherwise free and fair elections. Drawing on recent work in virtue epistemology, I provide an epistemic account of indoctrination according to which one is indoctrinated only if they hold an epistemically impactful belief with an intellectually vicious dogmatic attitude. After clarifying these notions, I show that politically indoctrinated subjects lack epistemic agency with respect to their vote, rendering them incompetent as voters. Therefore, if indoctrinated voters successfully elect a candidate, then the result is illegitimate, even if the election is otherwise free and fair. More speculatively, I suggest that this problem is not merely contingent, but structural: under conditions of low‐cost distribution of information, democracy incentivizes widespread indoctrination as a political strategy, thereby incentivizing a practice that undermines its own legitimacy.\n"]