This paper seeks to locate Adam Smith's thought within corruption debates and traditions. The discussion commences by outlining the material and intellectual context within which Smith wrote, after which it disputes claims that Smith may be readily aligned with either a classical or proto-Marxist “corruption and decline” tradition. The remainder of the paper is devoted to exploring in detail how he approached the topic. It is argued that he does not fit easily into any of the recognizable corruption frameworks but that he forges one all his own, borne of his anxieties about the activities of the English state in a rapidly expanding economy and his desire to develop the new science of political economy.