This article addresses the problem of ‘the legitimacy of the people’, that is, what constitutes the legitimate demarcation of the political units within which democracy is practiced? It is commonplace among philosophers to argue that this problem cannot be solved by appeal to democratic procedure because every attempt to do so results in an infinite regress. Based on a social contract theoretical analysis of the problem, this view is rejected. Although contract theorists have ignored the problem of the legitimacy of (...) the people, this article nevertheless argues for one specific, and currently dominant, type of contract view – ‘contractarianism’ – that it contains the conceptual tools to solve it. In a contractarian view, the people are understood as a cooperative venture for mutual advantage and accordingly consist of only those individuals for whom it is mutually beneficial to bind themselves to one another. It is argued that contractarianism offers a procedurally democratic solution to the problem of the legitimacy of the people that does not cause an infinite regress. Furthermore, this article refutes a classic criticism of contractarianism’s account of moral standing. Finally, the article demonstrates contractarianism’s practical implications for one specific articulation of the problem of the legitimacy of the people, namely, immigration. (shrink)