Mass Shootings in America
The Stanford Geospatial Center created these web pages to prompt a better understanding of the history of mass shootings in the United States over the past several decades. We hope that by presenting the data in visual form, patterns may emerge that can be studied to help prevent future tragedies and that this information will contribute to the national debate.
These data are not comprehensive and many questions remain about what additional data we should include. The names of all shooters have been removed from the maps and graphics; however, all pertinent information about the shooters, including name, age, sex and ethnicity is included in the original dataset, available per request. We will continue to build out these pages with state and federal regulatory information related to firearms and will continue to add to the dataset to make it more complete.
The data, map and graphics are free and may be embedded on any website with proper attribution. Please contact us if you would like access to the dataset or have suggestions.
A new perspective on a national issue
This interactive map shows the latest incidents in the US for the past few decades. Symbol size and color is displayed by the number of fatalities on each incident. Click on a symbol to find more information about the incident.
New ways of looking at the data such as timelines, scatterplots or network graphs help understand and visualize relationships and patterns.
The data has been collected using many different sources and is factual to the best of our knowledge from media sources. If you would like access to the complete dataset, contact us. We will also consider adding other information or events brought to our attention.