This is a list of mass or spree killers. A mass murderer is typically defined as someone who kills two or more people in one incident, with no "cooling off" period, not including themselves. 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.
Only the first 15 entries are shown here. For the entire list see: List of rampage killers in Africa
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
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
Only the first 15 entries are shown here. For the entire list see: List of rampage killers in Europe
Only the first 15 entries are shown here. For the entire list see: List of rampage killers in Oceania and Maritime Southeast Asia
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)
Only the first 15 entries are shown here. For the entire list see: List of rampage killers (school massacres) <br /> See also List of school-related attacks
Only the first 15 entries are shown here. For the entire list see: List of rampage killers (religious, political, or ethnic crimes)
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 the United States), List of rampage killers (familicides in Asia), List of rampage killers (familicides in China), List of rampage killers (familicides in Europe), and List of rampage killers (familicides in Oceania and Maritime Southeast Asia).
For other incidents in China see: Other incidents
The W-column gives a basic description of the weapons used in the murders