This chapter describes Jonathan Edwards’s doctrine of sin and evil. It emphasizes the role of the Bible as foundational to his theology while also highlighting his desire to defend the reasonableness of traditional Christian doctrine in light of eighteenth-century intellectual challenges. The chapter explores Edwards’s theodicy in response to the problem of evil—how he sought to absolve God of the charge that he is the author of evil. It describes Edwards’s doctrine of original sin and human depravity, which he explained by defending the universality of sin and the transmission of Adam’s sin to his posterity and in which he developed an innovative metaphysic using occasionalism and continuous creationism. As a pastor, Edwards preached on sin to warn people of punishment, call them to repentance, and emphasize redemption in Christ. The chapter recommends giving greater attention to Edwards’s sermons and pastoral ministry in understanding his view of sin and evil.