In this article I assess the coherence of Jonathan Edwards's doctrine of divine simplicity as an instance of an actus purus account of perfect-being theology. Edwards's view is an idiosyncratic version of this doctrine. This is due to a number of factors including his idealism and the Trinitarian context from which he developed his notion of simplicity. These complicating factors lead to a number of serious problems for his account, particularly with respect to the opera extra sunt indivisa principle. I conclude that Edwards sets out an interesting and subtle version of the doctrine, but one which appears mired in difficulties from which he is unable to extract himself.