The Church of Satan is a religious organization dedicated to the religion of LaVeyan Satanism as codified in The Satanic Bible. It was established in San Francisco, California, on Walpurgisnacht, April 30, 1966, by Anton Szandor LaVey, who was the churchs High Priest until his death in 1997. The Church of Satan describes its structural basis as a cabal that is "an underground cell-system of individuals who share the basis of . The Church of Satan was the first organized church in modern times to be devoted to the figure of Satan, and according to scholars, it represented "the first public, highly visible, and long-lasting organization which propounded a coherent satanic discourse".

Contrary to its name, the Church of Satan does not promote "evil" but rather humanistic values. Satan to them is a symbol of pride, liberty, and individualism, and it serves as an external metaphorical projection of their highest personal potential. They do not believe in Satan as a being or person. The Church of Satan puts the individual at the center of the universe, what high priest Peter Gilmore describes as going from an "a-theist" to an "I-theist".

The Satanic Temple (TST) is another organization that has gained attention in recent years. It was established in the United States in 2012 and has become the primary religious Satanic organization in the world with congregations internationally. The Satanic Temple encourages benevolence and empathy, rejects tyrannical authority, advocates practical common sense, opposes injustice, and undertakes high-profile public campaigns designed to preserve and advance secularism and individual liberties. While sharing the Church of Satans claim that Satan does not literally exist, TST rejected LaVeys right-libertarian philosophy in favor of a left-leaning progressive one.

In summary, the Church of Satan is a religious organization dedicated to the religion of LaVeyan Satanism, which is based on humanistic values and sees Satan as a symbol of pride, liberty, and individualism. The Satanic Temple is another organization that has gained attention in recent years and encourages benevolence and empathy, rejects tyrannical authority, advocates practical common sense, opposes injustice, and undertakes high-profile public campaigns designed to preserve and advance secularism and individual liberties.