Mass Shootings: A Research Guide: School Shootings

A category unto itself

Mass shootings at schools, from elementary schools to universities, constitute a much-discussed subcategory of mass shootings.

Perhaps the most infamous mass shooting in modern U.S. history took place at Columbine High School near Littleton, Colorado, on April 20, 1999 (13 dead).

Other incidents of note:

Virginia Tech (April 16, 2007; 32 dead)
Sandy Hook Elementary, Newtown, CT (Dec. 14, 2012; 26 dead)
Marjory Stoneman Douglas High School, Parkland, FL (Feb. 14, 2018; 17 dead)
Robb Elementary, Uvalde, TX (May 24, 2022; 21 dead)

Like other kinds of mass shootings, school shootings are not confined to the U.S. Selected examples:

April 26, 2002, Erfurt, Germany
Nov. 7, 2007, Tuusula, Finland
Sept. 23, 2008, Kauhajoki, Finland
March 11, 2009, Winnenden, Germany

K-12 School Shooting Database
A widely inclusive, open-source research project that documents when a gun is brandished, is fired, or a bullet hits school property for any reason, regardless of the number of victims, time, or day of the week.
18 Years of Gun Violence in U.S. Schools, Mapped
From the Washington Post, a news article with infographics.
Analysis of School Shootings
This report by an anti-gun violence advocacy organization attempts to track similarities in school shooting incidents.
Wikipedia's List of School Shootings
Attempts to list shootings starting with 1840. However, many of these would not qualify as mass shootings.