Timeline of major and deadliest incidents (1999–present)
Columbine High School — April 20, 1999; Littleton, CO — 13 killed, 23 wounded. A seminal event that reshaped school safety policy nationwide. (Wikipedia)
Red Lake Senior High — March 21, 2005; Red Lake, MN — 7 killed (plus the shooter’s earlier victims), multiple injured. (Wikipedia)
Virginia Tech (university) — April 16, 2007; Blacksburg, VA — 32 killed, many injured; deadliest school shooting in U.S. history. (Wikipedia)
Northern Illinois University — Feb 14, 2008; DeKalb, IL — 5 killed, 17 injured. (Wikipedia)
Sandy Hook Elementary — Dec 14, 2012; Newtown, CT — 26 killed (20 children, 6 staff). (Wikipedia)
Umpqua Community College — Oct 1, 2015; Roseburg, OR — 9 killed, 8 injured. (Wikipedia)
Townville Elementary — Sept 28, 2016; Townville, SC — 1 student killed, others injured (notable elementary-school incident). (Wikipedia)
Aztec High School — Dec 7, 2017; Aztec, NM — 2 students killed. (Wikipedia)
Marjory Stoneman Douglas High (Parkland) — Feb 14, 2018; Parkland, FL — 17 killed; catalyzed national youth activism. (Wikipedia)
Santa Fe High School — May 18, 2018; Santa Fe, TX — 10 killed. (Wikipedia)
Saugus High School — Nov 14, 2019; Santa Clarita, CA — 2 students killed, 3 injured. (Wikipedia)
Oxford High School — Nov 30, 2021; Oxford, MI — 4 students killed, 7 injured. (Wikipedia)
Robb Elementary (Uvalde) — May 24, 2022; Uvalde, TX — 19 children and 2 teachers killed; many injured. (Wikipedia)
Michigan State University — Feb 13, 2023; East Lansing, MI — 3 killed, 5 injured. (Wikipedia)
UNLV — Dec 6, 2023; Las Vegas, NV — 3 faculty killed, others injured (higher-ed). (Wikipedia)
Perry High School — Jan 4, 2024; Perry, IA — 3 killed (incl. principal), 6 injured. (Wikipedia)
Abundant Life Christian School — Dec 16, 2024; Madison, WI — 3 killed (incl. shooter), 6 injured. (Wikipedia)
Antioch High School — Jan 22, 2025; Nashville, TN — 2 killed, 2 injured. (Wikipedia)
The complete lists…
Washington Post’s interactive: filterable list of incidents since 1999, updated with new cases. (The Washington Post)
K-12 School Shooting Database (CHDS): exhaustive K-12 catalog (1966–present) with methodology notes and source links for each entry; ideal for researchers and policy readers. (K-12 School Shooting Database)
Year-by-year index (K-12 + higher-ed combined; community-maintained): helpful for cross-checking dates/locations. (Wikipedia)