List of mass shootings in the United States in 2021 information
For other years, see List of mass shootings in the United States.
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Mass shootings in the United States in 2021[1]
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Mass shootings in Alaska in 2021
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Mass shootings in the United States Virgin Islands in 2021
This is a list of mass shootings in the United States that occurred in 2021. Mass shootings are incidents involving several victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition.[2][3]
Gun Violence Archive, a nonprofit research group, run by Tracy Holtan, 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.[4] The Congressional Research Service narrows that definition, limiting it to "public mass shootings", defined by four or more victims killed, excluding any victims who survive.[5][6]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 shootings with fewer fatalities occur.[7][8] The crowdsourced Mass Shooting Tracker project has the most expansive definition of four or more shot in any incident, including the perpetrator in the victim inclusion criteria.[9][10] A 2019 study of mass shootings published in the journal Injury Epidemiology recommended developing "a standard definition that considers both fatalities and nonfatalities to most appropriately convey the burden of mass shootings on gun violence."[11] The authors of the study further suggested that "the definition of mass shooting should be four or more people, excluding the shooter, who are shot in a single event regardless of the motive, setting or number of deaths."[12]
As of December 2021, 693 (of which 303 resulted in zero deaths) fit the Mass Shooting Tracker project criterion, leaving 703 people dead and 2,842 injured, for a total of 3,545 total victims, some including the shooter(s).
^"Mass Shootings in 2021". Gun Violence Archive. Retrieved January 3, 2019.
^Borchers, Callum (October 4, 2017). "The vague definition of 'mass shooting' complicates media coverage". Washington Post. Retrieved August 26, 2018. ...'mass shooting' is a term without a universally-accepted definition.
^Bjelopera, Jerome (March 18, 2013). "Public Mass Shootings in the United States" (PDF). Congressional Research Service. Archived from the original (PDF) on September 9, 2013. Retrieved August 26, 2018. There is no broadly agreed-to, specific conceptualization of this issue, so this report uses its own definition for public mass shootings.
^"General Methodology". Gun Violence Archive. Retrieved August 27, 2018.
^Borchers, Callum (October 4, 2017). "The squishy definition of 'mass shooting' complicates media coverage". Washington Post. Retrieved August 26, 2018. ...'mass shooting' is a term without a universally-accepted definition.
^"Public Mass Shootings in the United States: Selected Implications for Federal Public Health and Safety Policy". Congressional Research Service. April 16, 2013.
^Berkowitz, Bonnie; Lu, Denise; Alcantara, Chris (September 14, 2018). "More than 50 years of U.S. mass shootings: The victims, sites, killers and weapons". Washington Post. Retrieved August 27, 2018.
^Follman, Mark; Aronsen, Gavin; Pan, Deanna (September 20, 2018). "A Guide to Mass Shootings in America". Mother Jones. Retrieved August 26, 2018.
^"About the Mass Shooting Tracker". Mass Shooting Tracker. Retrieved April 6, 2020.
^Michelle Ye Hee Lee (December 3, 2015). "Obama's inconsistent claim on the 'frequency' of mass shootings in the U.S. compared to other countries". Washington Post. Retrieved April 9, 2021.
^Marisa Booty; Jayne O'Dwyer; Daniel Webster; Alex McCourt; Cassandra Crifasi (2019). "Describing a "mass shooting": the role of databases in understanding burden". Injury Epidemiology. 6: 47. doi:10.1186/s40621-019-0226-7. PMC 6889601. PMID 31828004.
^Clayton, Abené (December 13, 2019). "What counts as a mass shooting? The dangerous effects of varying definitions". The Guardian. Retrieved April 8, 2021.
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