User:EdenRei/List of mass shootings in the United States

This is a list of known mass shootings that have occurred in the United States since 1966. Mass shootings are incidents involving multiple victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition.

The Gun Violence Archive, a nonprofit research group that tracks shootings and their characteristics in the United States, defines a mass shooting as an incident in which four or more people, excluding the perpetrator(s), are shot in one location at roughly the same time. The Congressional Research Service narrows that definition further, only considering what it defines as "public mass shootings", and only considering victims as those who are killed, excluding any victims who survive. The Washington Post and Mother Jones use similar definitions, with the latter acknowledging that their definition "is a conservative measure of the problem", as many rampages with fewer fatalities occur. Mass Shooting Tracker uses a definition even looser than the Gun Violence Archive's definition: four people shot in one incident regardless of the circumstances.

List of mass shootings
The MST, GVA, MJS, and WAP columns indicate if the incident is considered a mass shooting by the following sources' definitions:
 * MST – Mass Shooting Tracker: (2013-present) 4+ shot in one incident, at one location, at roughly the same time.
 * GVA – Gun Violence Archive: (2013-present) 4+ shot in one incident, excluding the perpetrator(s), at one location, at roughly the same time.
 * MJ – Mother Jones: (1982-2013) Same as WP. (2013-present) 3+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings.
 * WP – Washington Post: (1966-present) 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings.

Note: Figures for number shot include the perpetrator(s).