This is a list of mass or spree killers. A mass murderer is typically defined as someone who kills 2 or more people in one incident, with no "cooling off" period, not including themself. A mass murder typically occurs in a single location where one or more persons kill several others. Specific notable subtypes of mass murder, including politically motivated crimes, workplace killings, school attacks and familicides, have their own lists. This list does not include serial killers, members of democidal governments, or major political figures who orchestrated such actions.

Africa

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers in Africa

Americas

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers in the Americas and List of rampage killers in the United States

Asia

''Only the first 15 entries are shown here. For the entire list see'': List of rampage killers in Asia and List of rampage killers in China

Europe

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers in Europe

Oceania and Maritime Southeast Asia

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers in Oceania and Maritime Southeast Asia

Workplace killings

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers (workplace killings) and List of rampage killers (workplace violence in the military)

School massacres

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers (school massacres) See also List of school-related attacks

Religious, political, or ethnic crimes

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers (religious, political, or ethnic crimes)

Familicides

''Only the first 15 entries are shown here. For the entire list see:'' List of rampage killers (familicides in Africa), List of rampage killers (familicides in the Americas), List of rampage killers (familicides in Asia), List of rampage killers (familicides in China), List of rampage killers (familicides in Europe), List of rampage killers (familicides in Oceania and Maritime Southeast Asia).

Mass murders committed using grenades

Other incidents

For other incidents in China see: Other incidents

Annotation

The W-column gives a basic description of the weapons used in the murders