A haunted house, spook house or ghost house in ghostlore is a house or other building often perceived as being inhabited by disembodied spirits of the deceased who may have been former residents or were otherwise connected with the property. Parapsychologists often attribute haunting to the spirits of the dead who have suffered from violent or tragic events in the building's past such as murder, accidental death, or suicide.

According to Owen Davies, a paranormal historian, hauntings in the British Isles were usually attributed to fairies, but today hauntings are usually associated with ghostly or supernatural encounters. In other cultures around the world, various spirits are said to haunt vacant homes and locations. In Middle Eastern countries, for example, jinn are said to haunt such areas. Historically, since most people died in their homes, whether they were mansions or hovels, these homes allegedly became natural places for ghosts to haunt, with bedrooms being the most common rooms to be haunted. Many houses gained a reputation for being haunted after they were empty or derelict.Davies explains that "if people were to fail to occupy a human space, then external forces would move in."

A house in Amityville, on Long Island, New York, became the subject of books and films after apparent hauntings following the murder of the DeFeo family. The Lutz family purchased the home for a greatly reduced price but shortly after moving in claimed that doors were ripped open, damaging hinges and bending locks, windows were suddenly opened, green slime oozed from the ceiling and cloven-hooved footprints were left in the snow. The Lutzes remained in the home for only 28 days. In a court case where the Lutzes were sued, they admitted that almost everything in the 1977 book The Amityville Horror was fictional.

According to Owen Davies, a paranormal historian, hauntings in the British Isles were usually attributed to fairies, but today hauntings are usually associated with ghostly or supernatural encounters. In other cultures around the world, various spirits are said to haunt vacant homes and locations. In Middle Eastern countries, for example, jinn are said to haunt such areas. Historically, since most people died in their homes, whether they were mansions or hovels, these homes allegedly became natural places for ghosts to haunt, with bedrooms being the most common rooms to be haunted. Many houses gained a reputation for being haunted after they were empty or derelict.Davies explains that "if people were to fail to occupy a human space, then external forces would move in."