Between August 1982 and March 2026, 159 mass shootings were recorded in the United States. In 87 of them, the shooter was white. The perpetrator was Black in 27 cases and Latino in 12. In percentage terms, that amounted to about 55 percent white, 17 percent Black and 8 percent Latino. Race of mass shooters reflects the U.S. population Broadly speaking, the racial distribution of mass shootings mirrors the racial distribution of the U.S. population as a whole. Furthermore, looking at the mass shootings in the U.S. by gender clearly demonstrates that the majority of mass shootings are carried out by men. Mass shootings and mental health With no clear patterns between the socio-economic or cultural background of mass shooters, increasing attention has been placed on mental health. An analysis found that in over half of the mass shootings since 1982, the shooter showed prior signs of mental health issues. Mass shootings and guns In the wake of multiple mass shootings, critics have sought to look beyond the issues of shooter identification and their influences by focusing on their access to guns. The majority of mass shootings in the U.S. involve firearms that were obtained legally. Gun control takes on a particular significance when the uniquely American phenomenon of school shootings is considered. The annual number of incidents involving firearms at K-12 schools in the U.S. was over 100 in each year since 2018. Conversely, similar incidents in other developed countries were exceptionally rare.

Between August 1982 and March 2026, 153 mass shootings have been carried out in the United States by male shooters. In contrast, only six mass shootings have been carried out by or involved a woman shooter. Gun ownership in the U.S. Possession of firearms in the United States is protected by the 2nd Amendment of the Constitution and has been a defining aspect of American civil liberties since the writing of the Bill of Rights. It is estimated that the United States has the highest rate of civilian-owned firearms in the world, and Americans continually poll against handgun restrictions. Mass shootings However, with high gun ownership comes high responsibility. The United States consistently faces numerous mass shootings each year, particularly in schools. The five deadliest mass shootings have all occurred since 2007, with the deadliest being the Las Vegas Strip massacre in 2017, which claimed the lives of 58 people and injured 546 more.

From 1966 to January 2024, ** percent of mass public shooters who carried out the shooting at K-12 schools in the United States identified as White, followed by ** percent who were Native American and * percent who were Latinx. For mass public shootings occurring at colleges and universities, the shooter was most likely to identify as Asian, at ** percent, followed by ** percent who were White. In addition, Black and Middle Eastern shooters each made up ** percent. The source defines a mass public shooting as a multiple homicide incident in which 4 or more victims are murdered with firearms—not including the offender(s)—within one event, and at least some of the murders occurred in a public location or locations in close geographical proximity (e.g., a workplace, school, restaurant, or other public settings), and the murders are not attributable to any other underlying criminal activity or commonplace circumstance (armed robbery, criminal competition, insurance fraud, argument, or romantic triangle). Mass shootings attributable to gangs, as well as most domestic homicides, are therefore excluded from this definition.

Context

Mass Shootings in the United States of America (1966-2017)

The US has witnessed 398 mass shootings in last 50 years that resulted in 1,996 deaths and 2,488 injured. The latest and the worst mass shooting of October 2, 2017 killed 58 and injured 515 so far. The number of people injured in this attack is more than the number of people injured in all mass shootings of 2015 and 2016 combined.

The average number of mass shootings per year is 7 for the last 50 years that would claim 39 lives and 48 injured per year.

Content

Geography: United States of America

Time period: 1966-2017

Unit of analysis: Mass Shooting Attack

Dataset: The dataset contains detailed information of 398 mass shootings in the United States of America that killed 1996 and injured 2488 people.

Variables: The dataset contains Serial No, Title, Location, Date, Summary, Fatalities, Injured, Total Victims, Mental Health Issue, Race, Gender, and Lat-Long information.

Acknowledgements

I’ve consulted several public datasets and web pages to compile this data.

Some of the major data sources include Wikipedia, Mother Jones, Stanford, USA Today and other web sources.

Inspiration

With a broken heart, I like to call the attention of my fellow Kagglers to use Machine Learning and Data Sciences to help me explore these ideas:

• How many people got killed and injured per year?

• Visualize mass shootings on the U.S map

• Is there any correlation between shooter and his/her race, gender

• Any correlation with calendar dates? Do we have more deadly days, weeks or months on average

• What cities and states are more prone to such attacks

• Can you find and combine any other external datasets to enrich the analysis, for example, gun ownership by state

• Any other pattern you see that can help in prediction, crowd safety or in-depth analysis of the event

• How many shooters have some kind of mental health problem? Can we compare that shooter with general population with same condition

Mass Shootings Dataset Ver 3

This is the new Version of Mass Shootings Dataset. I've added eight new variables:

Incident Area (where the incident took place), Open/Close Location (Inside a building or open space) Target (possible target audience or company), Cause (Terrorism, Hate Crime, Fun (for no obvious reason etc.) Policeman Killed (how many on duty officers got killed) Age (age of the shooter) Employed (Y/N) Employed at (Employer Name) Age, Employed and Employed at (3 variables) contain shooter details

Mass Shootings Dataset Ver 4

Quite a few missing values have been added

Mass Shootings Dataset Ver 5

Three more recent mass shootings have been added including the Texas Church shooting of November 5, 2017

I hope it will help create more visualization and extract patterns.

Keep Coding!

Details Mass Shootings in the United States of America (1982-2022) The US has witnessed 124 mass shootings in the last 40 years, resulting in 997 deaths and 1420 injuries. The latest and the worst mass shooting of October 2, 2017, killed 58 and wounded 546. The number of people injured in this attack is more than those injured in all mass shootings of 2015 and 2016 combined.

Dataset Content Country: United States of America Period: 1982-2022 Dataset: The dataset contains detailed information of 124 mass shootings in the United States of America that killed 997 and caused 1420 injuries. Variables: CASE, GENDER, SHOOTINGTYPE, RACE, STATE, DATE, YEAR, FATALITIES, WOUNDED, TOTALVICTIMS, LOCATIONTYPE, PRIORSIGNSOFMENTALILLNESS, WEAPONSOBTAINEDLEGALLY, NUMWEAPONS, ASSAULT

In 2025, there were seven mass shootings recorded in the United States. This is compared to two mass shootings in 2024. Over the observed period, the highest number of mass shooting events to take place in a single year was 12, most recently in 2023. School shootings The United States sees the most school shootings in the world. Some motivations for school shootings included depression, seeking revenge, and bullying. Due to the large number of school shootings, gun control has become a central topic in U.S. politics. This widespread problem occurs across the country; however, California saw the highest number of K-12 school shootings in the United States since 1970. However, the deadliest school shooting was the Virginia Tech massacre in 2007. This tragedy left 33 dead and 23 injured. Mass shooting issues Mass shootings happen when there are several injuries or deaths from firearm-related violence. Despite the increase in mass shootings and the number of casualties, the U.S. government has achieved little in mitigating the problem. Furthermore, the right to bear arms is an important belief in the U.S. and the percentage of households in the United States owning at least one firearm has remained relatively steady since 1972.

One can easily find postings, articles, etc… in social network about mass shooting, gun violence, it's frequency, impacts, severity, and so on. However, one might be curious in its details of what the root causes are? where are common incident areas? Are those shooters mostly have mental health problem or some kind of severe psycho as everyone has mentioned about? What are those shooters features? How are their behaviors, age range, race, etc? or is there any correlational relationships between those features that helps us understand more about them and their motives? By having more insight of US Mass shooting cases, its common root cause, features of shooter and other related aspects, it might help every single individual to recognize sign of a mass shooter or can even have solutions on education, mental balance support, and obligation for preventing such tragedy to contribute to a better healthier society. For my world fellow friends, hope you all have a quality data source for your references, analysis and learning.

Content

This data covers raw data of mass shooting cases in US from 1966-2019. In fact it does not cover all cases but it gives analyst/ viewer a general viewpoint of gun violence situation in US. For my analysis on this data please find in links below: • US Mass Shooting 1: Overview Analysis and Root Cause 1966-2019 • US Mass Shooting 1: Shooter’s Analysis 1966-2019

Data structure shown in sheet "Data Structure". Data includes: • Fields: 24 • Rows: 339 (339 cases) • Data coverage: partial (not included all mass shooting cases but typical ones) data from 1966-2019 • Cleaned: Yes • Data cleaning procedure: click here • Original data source: (1) https://www.kaggle.com/zusmani/us-mass-shootings-last-50-years?select=Mass+Shootings+Dataset.csv , (2) https://www.motherjones.com/politics/2012/12/mass-shootings-mother-jones-full-data/ • Original data problems: Missing data, duplicate data, null data, partial or incomplete data (incomplete location name, missing latitude, longtitude, etc.), incorrect information (number of victims, etc.).

Acknowledgements

Thanks Zeeshan-ul-hassan Usmani and motherjones.com team for your contribution and wish everyone all the best.

This dataset provides highly detailed (Block Level) views of various demographics for Manhattan, New York city. this dataset includes information on age, race, sex, income, housing, and various other attributes. This data comes from the 2000 Us Census and was joined to the Census Tiger line files to create the output. enjoy!

HAZUS is an abbreviation for Hazards United States, and was developed by FEMA. The HAZUS dataset was designed to estimate the potential physical, economic and social losses during hazardous events such as flooding or earthquakes. To measure the social impact of these events, HAZUS includes detailed demographic data for the United States. This dataset pulls out the racial data from the demographic files, at the census block level for the Washington portion of the Portland Metropolitan Statistic Area (MSA). Attributes include Whites, Blacks, Asians, Hispanics, Hawaiian and Pacific Islanders, Native Americans, and populations stating other race. Demographics data was recent as of May 2006.

In the United States, Black people have higher rates of gun homicide than white people across all age groups. As of 2022, gun homicide rates were highest among Black people aged between 15 and 24 years, at ***** gun homicides per 100,000 of the population. In comparison, there were only **** gun homicides per 100,000 of the white population within this age range. However, the risk for gun homicide was greatest among all adolescents and adults between the ages of 15 to 44 in that year. The impact of guns on young Americans In the last few years, firearms have become the leading cause of death for American children and teenagers aged one to 19 years old, accounting for more deaths than car crashes and diseases. School shootings also remain on the rise recently, with the U.S. recording ** times as many school shootings than other high-income nations from 2009 to 2018. Black students in particular experience a disproportionately high number of school shootings relative to their population, and K-12 teachers at schools made up mostly of students of color are more likely to report feeling afraid that they or their students would be a victim of attack or harm. The right to bear arms Despite increasingly high rates of gun-related violence, gun ownership remains a significant part of American culture, largely due to the fact that the right to bear arms is written into the U.S. Constitution. Although firearms are the most common murder weapon used in the U.S., accounting for approximately ****** homicides in 2022, almost **** of American households have at least one firearm in their possession. Consequently, it is evident that firearms remain easily accessible nationwide, even though gun laws may vary from state to state. However, the topic of gun control still causes political controversy, as the majority of Republicans agree that it is more important to protect the right of Americans to own guns, while Democrats are more inclined to believe that it is more important to limit gun ownership.

This data explores the race/ethnicity of public agency children adopted for the fiscal year 2006 (from October 1,2005 to September 30, 2006) by state.

Gun ownership in the United States is the highest in the world, and constitutionally protected by the Second Amendment to the United States Constitution. Firearms are widely used in the United States for self-defence, hunting, and recreational uses, such as target shooting.

Source: https://www.kaggle.com/datasets/nidzsharma/us-mass-shootings-19822023

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Data columns:

• 0 case
• 1 location
• 2 date
• 3 summary
• 4 fatalities
• 5 injured
• 6 total_victims
• 7 location.1
• 8 age_of_shooter
• 9 prior_signs_mental_health_issues - Cleaned
• 10 mental_health_details - Cleaned
• 11 weapons_obtained_legally
• 12 where_obtained
• 13 weapon_type
• 14 weapon_details
• 15 race - cleaned
• 16 gender - cleaned
• 17 latitude - filled from location with Google Maps API
• 18 longitude - filled from location with Google Maps API
• 19 type
• 20 year - retrieved from date column
• 21 quarter - retrieved from date column
• 22 half - retrieved from date column
• 23 month_name - retrieved from date column
• 24 day_of_week - retrieved from date column
• 25 age_group - "Teenage", "Early Adulthood", "Middle Adulthood", "Old Age"
• 26 decade - retrieved from date
• 27 name - retrieved from splitting summary
• 28 current_age - retrieved from splitting summary
• 29 description - retrieved from splitting summary

This dataset includes Table 9Aand 9B. of the Maryland Vital Statistics Annual Report 2005 which includes the number of births and the birth rate for 2005 by race and Hispanic origin and by county. Rate are per 1,000 population. Rates that are based on fewer than five events in the numerator are not presented and are represented here as -1.

This dataset shows the origin and race of residents. The data is part of the Census Transportation Planning Package (CTPP), and is the result of a cooperative effort between various groups including the State Departments of Transportation, U.S. Census Bureau, and the Federal Highway Administration. The data is a special tabulation of responses from households completing the decennial census long form. The data was collected in 2000 and is shown at tract level.

This dataset is a boundary file obtained from the US Census Tiger Shape file library which can be found online. I downloaded the File for California then Used ESRI ArcMap to cut out the San Francisco MSA from Californai. Census demographic data was joined to the boundaries. This file includes attributes on Race and Populations and other demographic data.

Between 1970 and June 16, 2020, 175 school shootings were perpetrated by 17-year-olds. 16-year-olds perpetrated the second highest number of school shootings, with 163 shootings.

This dataset is taken from Table 11 of the Maryland Vital Statistics Annual Report 2005 which includes births in Maryland by age and race by county for 2005. Baltimore City and Baltimore County have been combined.

Between 1966 and 2025, students were the most likely offenders of K-12 school shootings in the United States, accounting for 42.7 percent of the shootings that took place in elementary and secondary schools. Within the provided time period, 2.7 percent of K-12 school shootings were perpetrated by a parent, while 3.6 percent were committed by a former student.

This dataset includes Table 11 of the Maryland Vital Statistics Annual Report 2005 which includes GENERAL FERTILITY RATES (Total births per 1,000 women ages 15-44.) AND BIRTH RATES (Live births per 1,000 women in specified age group.) BY AGE OF MOTHER, RACE OF MOTHER, REGION, AND POLITICAL SUBDIVISION, MARYLAND, 2005. Rates that are based on fewer than five events in the numerator are not presented and are represented here as -1. Numbers and rates for Baltimore city and Baltimore county are combined.

This dataset is from the website USA Election Polls. The data provide information from exit polls from the Democratic primaries in 2008 by state for race/ethnicity and gender. All values of -1 represent no available data.