The "aliens are demons" interpretation, sometimes called the demonic UFO hypothesis, holds that UFO sightings, alien beings and abduction experiences are produced by malevolent spiritual entities rather than by visitors from other planets. It is mainly a Christian reading, although some writers have substituted the Islamic concept of jinn. Proponents cite resemblances between modern encounter stories and older accounts of possession and demonic visitation, and read the frightening, deceptive side of many reports as a clue to their source.

The idea is nearly as old as the flying-saucer era. Dallas preacher W. V. Grant published a 1954 booklet identifying the saucer pilots as demons, and British author Gordon Creighton later described the entities as jinn. In the 1970s, evangelical books by Clifford Wilson and by John Weldon and Zola Levitt, along with Orthodox monk Seraphim Rose's Orthodoxy and the Religion of the Future, argued that UFOs were demonic manifestations. Secular writers fed the theme too: John Keel, in UFOs: Operation Trojan Horse (1970), proposed that a nonhuman intelligence staged events to sustain false beliefs and listed ghosts and demons among related anomalies. Nick Redfern's 2010 book Final Events introduced the alleged Collins Elite, a group of officials said to regard UFOs as demonic, which no agency has confirmed.

The interpretation is contested by religious thinkers as well as skeptics. Catholic theologian Corrado Balducci argued that alleged extraterrestrials should not automatically be classed as demons, and in 2008 Vatican Observatory director José Gabriel Funes said belief in extraterrestrial life was not opposed to Catholic teaching. Skeptics note that a supernatural explanation is hard to test and attribute most reports to misidentification, hoaxes and psychology. Author Whitley Strieber said in April 2026 that evangelical Christians would see the visitors as demons "and that will not be true," and Catholic seminary theologian Joel Parkyn, who believes demons are real, called the blanket view "demonological reductionism."

The view reached national politics in 2026. Vice President JD Vance told Benny Johnson's podcast in March, "I don't think they're aliens, I think they're demons," while also saying he hoped to see the government's UFO records. In June the Archdiocese of Washington removed exorcist Monsignor Stephen Rossetti after he said many UFO sightings were demons; Cardinal Robert McElroy said statements linking UFOs to demonic presence undermined Church teaching on the devil and exorcism. The demonic reading now shapes how some officials, clergy and believers frame what disclosure of non-human intelligence would mean.