| Newtown, Connecticut | December 14 | 2012 | 27 | Killed mother before mass shooting at school; committed suicide |
| Taft Union High School shooting | Taft, California | January 10 | 2013 | 0 | Surrendered and arrested |
| Lone Star College–North Harris | Harris County, Texas | January 22 | 2013 | 0 | Arrested and imprisoned |
| University of Central Florida | Orlando, Florida | March 18 | 2013 | 1 | Committed suicide |
| Davidson Middle School | Southgate, Michigan | March 21 | 2013 | 1 | Committed suicide |
| Massachusetts Institute of Technology | Cambridge, Massachusetts | April 18 | 2013 | 2 | One of the shooters was killed, the other surrendered and imprisoned hours later |
| La Salle High School | Cincinnati, Ohio | April 29 | 2013 | 0 | Shot himself |
| Santa Monica College | Santa Monica, California | June 7 | 2013 | 6 | Killed father and brother before shooting at school; shot and killed by police |
| Alexander W. Dreyfoos School | West Palm Beach, Florida | June 20 | 2013 | 2 | Unknown |
| Ronald E. McNair Discover Learning Academy Elementary School shooting | Decatur, Georgia | August 20 | 2013 | 0 | Arrested and imprisoned |
| North Panola High School | Sardis, Mississippi | August 23 | 2013 | 1 | Three suspects arrested |
| Carver High School | Winston-Salem, North Carolina | August 30 | 2013 | 0 | Arrested |
| Gray-New Gloucester High School | Gray, Maine | September 28 | 2013 | 1 | Unknown |
| J.W. Sexton High School | Lansing, Michigan | September 28 | 2013 | 0 | Unknown |
| Agape Christian Academy | Pine Hills, Florida | October 4 | 2013 | 0 | Not arrested |
| Lanier High School | Austin, Texas | October 15 | 2013 | 1 | Suicide killing |
| Sparks Middle School shooting | Sparks, Nevada | October 21 | 2013 | 2 | Committed suicide |
| North Carolina A&T State University | Greensboro, North Carolina | November 2 | 2013 | 0 | Not arrested |
| Stephenson High School | Lithonia, Georgia | November 3 | 2013 | 0 | Unknown |
| Brashear High School | Pittsburgh, Pennsylvania | November 13 | 2013 | 0 | Six shooters arrested |
| Liberty University | Lynchburg, Virginia | November 19 | 2013 | 1 | Shot and killed |
| South Dakota School of Mines & Technology | Rapid City, South Dakota | November 26 | 2013 | 1 | Committed suicide |
| West Orange High School | Winter Garden, Florida | December 4 | 2013 | 0 | Arrested |
| Arapahoe High School shooting | Centennial, Colorado | December 13 | 2013 | 2 | Committed suicide |
| Edison High School | Fresno, California | December 19 | 2013 | 0 | Arrested |
| Liberty Technology Magnet High School | Jackson, Tennessee | January 9 | 2014 | 0 | Arrested |
| Hillhouse High School | New Haven, Connecticut | January 13 | 2014 | 0 | Arrested |
| Berrendo Middle School | Roswell, New Mexico | January 14 | 2014 | 0 | Arrested |
| Delaware Valley Charter School | Philadelphia, Pennsylvania | January 17 | 2014 | 0 | Arrested |
| Albany High School | Albany, Georgia | January 17 | 2014 | 0 | Not arrested |
| Widener University | Chester, Pennsylvania | January 20 | 2014 | 0 | Not arrested |
| Purdue University | West Lafayette, Indiana | January 21 | 2014 | 1 | Arrested |
| South Carolina State University | Orangeburg, South Carolina | January 24 | 2014 | 1 | Arrested, charged |
| Los Angeles Valley College | Los Angeles, California | January 25 | 2014 | 1 | Two suspects arrested |
| Phoenix High School | Lawrenceville, Georgia | January 27 | 2014 | 1 | Suspect apprehended |
| Rebound High School | Carbondale, Illinois | January 27 | 2014 | 0 | Not arrested |
| President Theodore Roosevelt High School | Honolulu, Hawaii | January 28 | 2014 | 0 | Arrested and charged |
| Tennessee State University | Nashville, Tennessee | January 28 | 2014 | 0 | Unknown |
| Eastern Florida State College | Palm Bay, Florida | January 30 | 2014 | 0 | Unknown |
| North High School | Des Moines, Iowa | January 31 | 2014 | 0 | Unknown |
| Redemptorist High School | Baton Rouge, Louisiana | February 6 | 2014 | 0 | Suspects fled the scene |
| Linden West Elementary School | Gladstone, Missouri | February 7 | 2014 | 0 | Suspect surrendered |
| Bend High School | Bend, Oregon | February 8 | 2014 | 1 | Committed suicide |
| Charles F. Brush High School | Lyndhurst, Ohio | February 10 | 2014 | 0 | Unknown |
| Reseda Elementary School | Los Angeles, California | February 10 | 2014 | 0 | Suspect in custody |
| Salisbury High School | Salisbury, North Carolina | February 10 | 2014 | 0 | Arrested |
| Thornridge High School | Dolton, Illinois | February 11 | 2014 | 0 | Fled the scene |
| University of Southern California | Los Angeles, California | February 12 | 2014 | 0 | Unknown |
| Cesar Chavez Elementary School | Coachella, California | February 13 | 2014 | 0 | Unknown |
| Ambler School | Ambler, Alaska | February 15 | 2014 | 0 | Arrested and charged |
| Banks-Caddell Elementary | Decatur, Alabama | February 18 | 2014 | 0 | Fled the area |
| Lovejoy Elementary School | Alton, Illinois | February 19 | 2014 | 0 | Suspect arrested and charged |
| Raytown Success Academy | Raytown, Missouri | February 20 | 2014 | 1 | Arrested |
| John F. Kennedy High School | Cleveland, Ohio | February 21 | 2014 | 0 | Unknown |
| San Jose State University | San Jose, California | February 21 | 2014 | 1 | Shot and killed |
| Georgia Regents University | Augusta, Georgia | February 22 | 2014 | 0 | Unknown |
| Sandy Plains Elementary School | Baltimore, Maryland | February 27 | 2014 | 1 | Suspect in custody |
| William Penn Senior High School | York, Pennsylvania | February 28 | 2014 | 0 | One suspect fled the scene |
| Frank M. Wright Elementary School | El Monte, California | March 7 | 2014 | 1 | Suspect committed suicide |
| Foothill High School | Sacramento, California | March 11 | 2014 | 0 | The suspect/s was/were not apprehended |
| La Salle University | Philadelphia, Pennsylvania | March 11 | 2014 | 1 | The suspect was not apprehended |
| New Hanover High School | Wilmington, North Carolina | March 11 | 2014 | 0 | The suspect was arrested and charged |
| The Academy of Knowledge Preschool | Miami, Florida | March 12 | 2014 | 1 | The suspect fled the scene |
| Woodrow Wilson High School | Portland, Oregon | March 12 | 2014 | 1 | The suspect was killed |
