Editor’s note: This database originally covered cases from 1982-2012 and has since been expanded numerous times to remain current. For analysis and context on this data—including how we built the database, and a change to the baseline for victim fatalities with cases dating from January 2013—see our Guide to Mass Shootings in America, which includes an interactive map documenting all of the cases.

You can scan the underlying spreadsheet by clicking here and download the database in its entirety (in CSV format) by clicking here.