Necrophobia is a specific phobia which is the irrational fear of dead things (e.g., corpses) as well as things associated with death (e.g., coffins, tombstones, funerals, cemeteries). With all types of emotions, obsession with death becomes evident in both fascination and objectification. In a cultural sense, necrophobia may also be used to mean a fear of the dead by a cultural group, e.g., a belief that the spirits of the dead will return to haunt the living.

Symptoms include: shortness of breath, rapid breathing, irregular heartbeat, sweating, dry mouth and shaking, feeling sick and uneasy, psychological instability, and an altogether feeling of dread and trepidation. The sufferer may feel this phobia all the time. The sufferer may also experience this sensation when something triggers the fear, like a close encounter with a dead animal or the funeral of a loved one or friend. The fear may have developed when a person witnessed a death, or was forced to attend a funeral as a child. Some people experience this after viewing frightening media.

The fear can manifest itself as a serious condition. Treatment options include medication and therapy.

The word "necrophobia" is derived from the Greek "nekros" () for "corpse" and the Greek "phobos" () for "fear".

Predatory death anxiety arises from the fear of being harmed. It is the most basic and oldest form of death anxiety, with its origins in the first unicellular organisms’ set of adaptive resources. Unicellular organisms have receptors that have evolved to react to external dangers, along with self-protective, responsive mechanisms made to guarantee survival in the face of chemical and physical forms of attack or danger. In humans, predatory death anxiety is evoked by a variety of danger situations that put one at risk or threaten one's survival. These traumas may be physical, psychological, or both. Predatory death anxiety mobilizes an individual’s adaptive resources and leads to a fight-or-flight response: active efforts to combat the danger or attempts to escape the threatening situation.

It is during the years of young adulthood (20 to 40 years of age) that death anxiety most often begins to become prevalent. However, during the next phase of life, the middle age adult years (40–64 years of age), death anxiety peaks at its highest levels when in comparison to all other age ranges throughout the lifespan. Surprisingly, levels of death anxiety then slump off in the old age years of adulthood (65 years of age and older). This is in contrast with most people’s expectations, especially regarding all of the negative connotations younger adults have about the elderly and the aging process (Kurlychek & Trenner, 1982).