What composes an Evangelical demonology? This dissertation aims to provide a fresh Evangelical demonology, reflecting and systematizing the biblical material on the demonic. To begin the process, Byang Kato’s background and demonology is examined, since Kato himself has a unique relationship to demonic practices by virtue of his upbringing. His demonological efforts are headlined by a booklet on the spirits, and throughout the rest of Kato’s theological output, Satan and his wicked comrades are frequently mentioned. Overall, Kato’s work presents timely contributions for our demonological goals, especially considering the multicultural context. In an increasingly intermingled world, with many backgrounds being represented in multicultural Christian communities, Kato’s demonology is a superior model. Human perceptions concerning the demonic are often inseparable from prevailing cultural attitudes, and the temptation to exalt one’s own culture must be avoided, especially due to the new norm of multicultural churches, para-church organizations, and seminaries. Kato’s demonology gravitates to the biblical material, and thus it delivers both challenges and affirmations to every party. Furthermore, Kato’s writings on the demonic are inherently linked to soteriology. After discerning some of the major themes of Kato’s soteriology, his exclusivism (and how it relates to demonology) is specifically discussed. Since Kato views the world outside of Christ as the dominion of Satan and the demonic, he advocates that one must turn to Christ for redemption. Then an Evangelical demonology itself is constructed. After highlighting particular contributions from Kato, criteria are outlined for the project before launching into the primary content. Demonic activity throughout the Bible is surveyed, and the argument is offered that demons do act as malevolent personal beings intent on instigating evil in the created order. Through this study of the demonic, the assertion that “demonology matters” is presented, as the doctrine of the demonic relates to the reliability of the Bible and the quality of our salvation. A biblical, Evangelical demonology also rises to modern challenges, including skepticism and speculation. Christians are planted on the sure ground of the Scriptures, prepared for the spiritual realities of the world in which we live. / Philosophy, Practical and Systematic Theology / D. Th. (Systematic Theology)