The Stanford Geospatial Center (SGC) is a division of the Stanford University Libraries whose mission is to provide geospatial services and resources in support of research and education.


In December 2012, the Stanford Geospatial Center began collecting data on mass shooting incidents in the United States. The center felt that additional information was needed in order to better understand this phenomenon. As described in an article written by doctor John M. Harris Jr. and Robin B. Harris in the June 2012 issue of the American Journal of Public Health, there is a need for better research into "rampage violence". Please refer to the document below for the full article:


The purpose of this project is to provide quantitative and descriptive geographic information about mass shootings in the United States in order to better understand this national problem. The center also provides maps and charts as additional information so that the public may be able to identify patterns and correlations.

This data offers a neutral and unbiased perspectiveon this social phenomenon.



Percentage of incidents by place type. Graphic: Stanford Geospatial Center

The complete database has a total of 36 different data fields that provides detail and general information about the shooter, victims, the place where the incident occurred and the guns used; the database also has 73 sub-categories. This database is not comprehensive and we continue to build and improve it.

For additional information about the database please visit our metadata section.

Open source data

The Stanford Geospatial center has collected its data from many different public sources, with a focus on events that have occurred in the United States between 1966 and 2013. SGC is currently working to make the data set more complete in terms of the number of incidents recorded and the full information about each event. SGC is also planning to add policy resources and government information.

This database is covered by an Attribution-NonCommercial 3.0 Creative Commons License. This means you are free to share and remix the work if you attribute it as stated and you agree to use the database only for non-commercial purposes. You may read more about the license here.

If you have any questions or concerns about this project, please contact us.

This project is a tribute to the children and adults who lost their lives at Sandy Hook Elementary School on December 14, 2012 in Newtown, CT.