These are lists of the most notable mass shootings in the United States that have occurred since 1900:

List of mass shootings in the United States in the 2020s List of mass shootings in the United States (2010–2019) List of mass shootings in the United States (2000–2009) List of mass shootings in the United States (1900–1999)

Mass shootings 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, 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, with the FBI having a minimum of three. 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. The crowdsourced 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 broadest 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. Gun Violence Archive/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. The Washington Post: 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings. Congressional Research Service: 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.

Summaries

Summary list since 2018 which includes all mass shooting events, deaths, injuries, and victims documented across Wikipedia. Sources for these statistics can be found in the corresponding articles. YearEventsDeadInjuredVictims202542542019002320202458671123753086202360073924403179202269576229023664202169043116882125202061552125413062201943451716432160201832338712831670

Data compiled from Server provides data about mass shootings from the beginning of 2013, including the date, U.S. city and state, number of killed, number of wounded, perpetrators, and sources on internet. Following are some reports out of this data.

Summary for the years 2013 through 2017 (inclusive) with at least 4 victims per event. YearEventsDeadInjuredVictims 2017 434 600 1994 2594 2016 479 606 1790 2396 2015 371 469 1387 1856 2014 325 364 1213 1577 2013 339 467 1176 1643

Summary for the years 2013 through 2017 (inclusive) with at least 4 people killed per event. YearEventsDeadInjuredVictims 2017 249 600 1113 1713 2016 270 606 851 1457 2015 212 469 622 1091 2014 180 364 512 876 2013 209 467 551 1018

Top 10 U.S. States with most mass shootings each year.

YearStates with most mass shootings 2024 (Jan–Jul) FL/IL (31), CA (26), TX (22), PA (21), MO (19), MS/AL (18), GA/NC (16) 2023 CA (58), IL (54), FL/PA/NC (36), OH (35), LA (33), GA (30), MS (26), TN (25) 2022 TX (63), IL (61), CA (58), GA/PA (39), NY (36), FL (34), LA (33), MI (29), NC (27) 2021 IL (91), TX (72), CA (54), OH (43), NY (41), PA/LA (39), FL (34), AL (31), MI/GA (28) 2020 IL (77), TX (50), CA (44), FL (41), NY (39), PA (36), LA (33), MO (27), OH (26), MI (25) 2019 CA (54), IL (45), TX (42), LA (28), MD (25), PA (24), OH (21), GA/FL (20), MO (19) 2018 CA (45), IL (41), FL (37), TN (23), TX (21), PA (20), MO (19), NC/NY/AL (17) 2017 CA (49), IL (41), TX (30), FL (29), OH (26), PA (20), LA (19), NY/TN (15), NJ (14), 2016 CA (52), IL (46), TX (44), FL (35), GA (23), AL (22), NY/LA (17), OH (16), TN (15), 2015 FL (30), CA (28), IL (26), NY (22), GA/TX (21), LA (18), OH (16), MD/PA (14) 2014 CA (43), IL (33), FL (22), TX (21), GA (19), MI (15), NY/TN/PA (13), LA (12) 2013 CA (47), FL/IL (21), NC (17), NY (16), MI/TX/PA (15), MO (13), TN/VA/OH (11)

Deadliest months in the U.S. (regarding mass shootings) each year.

YearDeadliest months 2024 (Jan–Jul) Jun (80), Jul (70), May (54), Jan (46), Mar (44) 2023 Jul (92), May (88), Jun (80), Apr (75), Oct (70) 2022 Jul (103), Aug (78), Jun (77), Sep (76), May (74) 2021 Jun (98), Jul (95), May (92), Oct (83), Aug (81) 2020 Jun (106), Jul (101), Aug (83), Sep (70), May (70) 2019 Jun (60), Jul (57), Aug (56), May (53), Dec (44) 2018 Jul (60), Jun (59), Sep (41), May (38), Aug (37) 2017 Jul (46), Apr (46), Jun (44), Jan (43), Aug (41) 2016 Jul (59), Jun (53), Aug (51), Nov (43), Sep (42) 2015 Jul (45), Jun (42), Aug (41), May (38), Sep (38) 2014 Aug (50), Jul (34), May (29), Sep (28), Dec (27) 2013 Jun (39), Jul (38), May (34), Sep (33), Aug (32)

Months with most mass shooting events. MonthEvents July 800 June 763 August 632 May 631 September 521 April 511 October 501 November 425 March 416 January 403 February 373 December 360

Months with most casualties in mass shootings. MonthDead June 826 July 784 May 729 October 690 August 644 January 633 April 606 February 567 November 561 September 537 March 524 December 487

US Mass Shootings, 1982–2024 – Data From Mother Jones’ Investigation Data from the article from Mother Jones compile data about 150 mass shootings from 1982, 22 of which classifies as a "Sprees". The data reveal, among other things: the age of perpetrator(s). The youngest was 11, the oldest 72, the average is 33 years and 8 months. the gender of perpetrator(s). Out of 150 events listed, 144 of them are committed by males, 4 by females, 2 by male and female. First shooting perpetrated by a female from the list is from 2006. the environment: 35.3% workplace, 15.3% school, 5.3% religious, 4% military, 36.7% other. whether the weapon was obtained legally: yes (in 64.7% of all cases); no (10.6%), unknown/to be determined (24.7%) the ethnicity of perpetrator(s): white (54% of all cases), black (17.3%), Latino (8%), Asian (6.7%), Native American (2%)

See also List of school shootings in the United States by death toll List of school shootings in the United States (before 2000) List of school shootings in the United States (2000–present) List of unsuccessful attacks related to schools

List of rampage killers in the United States List of countries by firearm-related death rate List of countries by intentional homicide rate Percent of households with guns by country Estimated number of civilian guns per capita by country Gun violence in the United States

References

External links Gun Violence Archive Mass Shootings Mother Jones Mass Shootings Vox Mass Shootings Washington Post Mass Shootings