This is a list of the most notable

mass shootings in the United States Mass shootings are incidents involving multiple victims of firearm-related violence. Definitions vary, with no single, broadly accepted definition. One definition is an act of public firearm violence—excluding gang killings, domestic violen ...

that have occurred since 1920.

Mass shooting There is a lack of consensus on how to define a mass shooting. Most terms define a minimum of three or four victims of gun violence (not including the shooter or in an inner city) in a short period of time, although an Australian study from 20 ...

s are incidents involving several victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition. Only shootings that have Wikipedia articles of their own are included in this list. Detailed lists of mass shootings can be found per year at their respective pages. The

Gun Violence Archive Gun Violence Archive (GVA) is an American nonprofit group with an accompanying website and social media delivery platforms which catalogs every incident of gun violence in the United States. It was founded by Michael Klein and Mark Bryant. Klein i ...

, 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 The Congressional Research Service (CRS) is a public policy research institute of the United States Congress. Operating within the Library of Congress, it works primarily and directly for members of Congress and their committees and staff on a ...

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 ''The Washington Post'' (also known as the ''Post'' and, informally, ''WaPo'') is an American daily newspaper published in Washington, D.C. It is the most widely circulated newspaper within the Washington metropolitan area and has a large nati ...

'' 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. The

crowdsourced Crowdsourcing involves a large group of dispersed participants contributing or producing goods or services—including ideas, votes, micro-tasks, and finances—for payment or as volunteers. Contemporary crowdsourcing often involves digit ...

Mass Shooting Tracker project uses a looser definition than the Gun Violence Archive's definition: four people shot in one incident regardless of the circumstances. Larger documentation of mass shootings in the United States has occurred through independent and scholarly studies such as the Stanford University Mass Shootings in America Data Project.

Definitions

There are varying definitions of a mass shooting. Listed roughly from most broad to most restrictive: :* Stanford MSA Data Project: three or more persons shot in one incident, excluding the perpetrator(s), at one location, at roughly the same time. Excluded are shootings associated with organized crime, gangs or drug wars. :* Mass Shooting Tracker: 4+ shot in one incident, at one location, at roughly the same time. :* ''

''/'' Vox'': 4+ shot in one incident, excluding the perpetrator(s), at one location, at roughly the same time. :* ''Mother Jones'': 3+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings. :* ''

'': 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings. :*

: 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings, acts carried out that were inspired by criminal profit, and terrorism.

List of mass shootings (21st century)

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2000s

Summary

Summary list since 2018 which includes all mass shooting events, deaths, injuries, and victims documented across Wikipedia. * as of Mar 31, 2023

List of mass shootings (20th century)

1990s

1980s

1970s

1960s

1950s

1940s

1930s

1920s

Notes

References

External links

''Gun Violence Archive'' Mass Shootings

''Mother Jones'' Mass Shootings

''Vox'' Mass Shootings

''Washington Post'' Mass Shootings
{{Mass shootings in the United States

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

Mass murder in the United States School massacres in the United States * School shootings committed by pupils United States crime-related lists