Theistic Satanism, otherwise referred to as religious Satanism, spiritual Satanism, or traditional Satanism, is an umbrella term for religious groups that consider Satan, the Devil, to objectively exist as a deity, supernatural entity, or spiritual being worthy of worship or reverence, whom individuals may contact and convene with, in contrast to the atheistic archetype, metaphor, or symbol found in LaVeyan Satanism. Organizations who uphold theistic Satanist beliefs most often have few adherents, are loosely affiliated or constitute themselves as independent groups and cabals, which have largely self-marginalized. Another prominent characteristic of theistic Satanism is the use of various types of magic. Most theistic Satanist groups exist in relatively new models and ideologies, many of which are independent of the Abrahamic religions.

Satan, also known as the Devil, and sometimes also called Lucifer in Christianity, is an entity in Abrahamic religions that seduces humans into sin or falsehood. In Judaism, Satan is seen as an agent subservient to God, typically regarded as a metaphor for the yetzer hara, or "evil inclination". In Christianity and Islam, he is usually seen as a fallen angel or jinn who has rebelled against God, who nevertheless allows him temporary power over the fallen world and a host of demons. In the Quran, Shaitan, also known as Iblis, is an entity made of fire who was cast out of Heaven because he refused to bow before the newly created Adam and incites humans to sin by infecting their minds with waswās.