Mass Shootings in America
An in-depth analysis
Data
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.
A new perspective on a national issue
This website has been built by the Stanford Geospatial Center for the purpose of understanding the history of mass shootings in the United States over the past few decades. It is hoped that by presenting the data in visual form, patterns may emerge that can be studied to help prevent future tragedies and that this information contributes to the national debate.
The database is not fully finalized and many questions remain as to what to include on the site. The names of all shooters have been removed from the maps and charts. However this information, as well as their age, sex, history of mental illness, and possible motive remain in the original dataset that is available at no cost to the public. We will continue to build out this website with pertinent state and federal regulatory information related to firearms and will continue to add to the dataset in order to make it more complete.
The data, maps, 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, would like to embed the graphics in your own website or publication, or have suggestions to improve this site.