# List of mass shootings in the United States (1900–1999)

This is a list of notable mass shootings in the United States in the 20th century.
Mass shootings are incidents involving several victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition.
The Gun Violence Archive, a nonprofit research group that tracks shootings and their characteristics in the United States, defines a mass shooting as an incident in which four or more people, excluding the perpetrator(s), are shot in one location at roughly the same time. The Congressional Research Service narrows that definition further, only considering what it defines as "public mass shootings", and only considering victims as those who are killed, excluding any victims who survive. The Washington Post and Mother Jones use similar definitions, with the latter acknowledging that their definition "is a conservative measure of the problem", as many rampages with fewer fatalities occur. The crowdsourced Mass Shooting Tracker project uses a definition even looser than the Gun Violence Archive's definition: four people shot in one incident regardless of the circumstances.
Better documentation of mass shootings in the United States has occurred through independent and scholarly studies such as the Stanford University Mass Shootings in America Data Project.

## Definitions

There are varying definitions of a mass shooting. Listed roughly from most broad to most restrictive:
    Stanford MSA Data Project: 3+ shot in one incident, at one location, at roughly the same time, excluding organized crime, as well as gang-related and drug-related shootings.
    Mass Shooting Tracker: 4+ shot in one incident, at one location, at roughly the same time.
    Gun Violence Archive/Vox: 4+ shot in one incident, excluding the perpetrator(s), at one location, at roughly the same time.
    Mother Jones: 3+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings.
    The Washington Post: 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings.
    Congressional Research Service: 4+ shot and killed in one incident, excluding the perpetrator(s), at a public place, excluding gang-related killings, acts carried out that were inspired by criminal profit, and terrorism.
Only shootings that have Wikipedia articles of their own are included in this list. Detailed lists of shootings can be found per-year at their respective pages.

## List
### 1990s

| Date | Location | Dead | Injured | Total | Description |
| December 31, 1999 | Tampa, Florida | 5 | 3 | 8 | A hotel employee gunned down four of his workers at a hotel, then fled the scene to kill a woman after she refused to give up her car. Three others were wounded during the spree shootings. |
| December 5, 1999 | Baltimore, Maryland | 5 | 0 | 5 | Five women were found shot to death in a row house. |
| November 2, 1999 | Honolulu, Hawaii | 7 | 0 | 7 | 1999 Honolulu shootings: A service technician opened fire inside a Xerox building and killed seven people while an eighth escaped. The perpetrator then held thirty-five school children inside the Hawaii Nature Center before surrendering to police. |
| September 15, 1999 | Fort Worth, Texas | 8 | 7 | 15 | Wedgewood Baptist Church shooting: During a concert in the church for teenagers, the perpetrator entered and shot and killed seven attendees and wounded seven others before committing suicide. |
| August 10, 1999 | Los Angeles, California | 1 | 5 | 6 | Los Angeles Jewish Community Center shooting: Affiliated with the Aryan Nations, the perpetrator killed one and wounded five when entering a Jewish community center. |
| May 20, 1999 | Conyers, Georgia | 0 | 6 | 6 | Heritage High School shooting: A 15-year-old student opened fire and wounded six students before attempting suicide, he was stopped by an assistant principal, who had gone to his vehicle and retrieved a M1911a1, a .45 caliber handgun, then returned to the school and confronted the shooter. |
| April 20, 1999 | Columbine, Colorado | 15 | 24 | 39 | Columbine High School massacre: Two students from the school shot and killed twelve classmates and a teacher before committing suicide. |
| January 3, 1999 | Compton, California | 2 | 2 | 4 | A gang member shot four security guards, killing two, at a low-income housing complex. |
| May 29, 1998 | Compton, California | 3 | 0 | 3 | Three known gang members were killed during a shootout at Rob's Car Wash in Compton. One of the people killed was Orlando Anderson, the prime suspect in rapper Tupac Shakur's murder. |
| May 21, 1998 | Springfield, Oregon | 4 | 25 | 29 | Thurston High School shooting: An expelled student targeted his parents and the school and killed four people and injured twenty-five others before being arrested. |
| April 24, 1998 | Edinboro, Pennsylvania | 1 | 3 | 4 | 1998 Parker Middle School dance shooting: A 14-year-old student opened fire and fatally shot a teacher and injured another and two students during an 8th grade dance, before being arrested. |
| April 22, 1998 | Inglewood, California | 3 | 0 | 3 | A man shot and killed two of his co-workers before killing himself. |
| March 24, 1998 | Craighead County, Arkansas | 5 | 10 | 15 | 1998 Westside Middle School shooting: Two students aged 11 and 13, shot and killed four students and a teacher and injured ten others before being arrested. |
| January 3, 1998 | New York City, New York | 3 | 1 | 4 | Three men, ages 23, 24 and 27 were fatally shot outside a bar in the Soundview neighborhood of The Bronx. |
| December 19, 1997 | Orange, California | 5 | 2 | 7 | A recently fired employee went back to his former workplace and killed four people before being killed by police. |
| December 1, 1997 | West Paducah, Kentucky | 3 | 5 | 8 | 1997 Heath High School shooting: A 14-year-old student opened fire on a group of students praying before the school opened, killing three and injuring five before surrendering. |
| October 1, 1997 | Pearl, Mississippi | 3 | 7 | 10 | 1997 Pearl High School shooting: The perpetrator shot and killed his mother, then drove to the high school and shot and killed two students and injured seven before being arrested. |
| July 6, 1997 | Washington, D.C. | 3 | 0 | 3 | Starbucks murders: Three Starbucks employees were killed during a robbery. |
| June 6, 1997 | Santa Fe Springs, California | 3 | 4 | 6 | A 38-year-old man shot and killed two men and wounded four others before fatally shooting himself on a South Los Angeles street. |
| March 11, 1997 | Detroit, Michigan | 4 | 2 | 6 | 1997 Detroit shootings: An armed gunman opened fire killing three people and wounding two others in northeast Detroit before being killed by police. |
| February 19, 1997 | Bethel, Alaska | 2 | 2 | 4 | 1997 Bethel Regional High School shooting: A student shot and killed two people and wounded two others before surrendering to police. He was reportedly assisted by several students in learning how to shoot, and many knew about the shooting plans in advance. |
| October 27, 1996 | San Marcos, California | 4 | 1 | 5 | A woman fatally shot her four sons in the head inside a residence. The woman then attempted to commit suicide by shooting her; the woman survived. |
| September 1, 1996 | Dennehotso, Arizona | 4 | 1 | 5 | A man shot five of his children, killing four. |
| June 22, 1996 | Sauk Centre, Minnesota | 5 | 0 | 5 | A man killed a family living next door over a property dispute before turning the gun on himself. |
| April 12, 1996 | Jackson, Mississippi | 2 | 10 | 12 | A 53-year-old white supremacist shot eleven black people at a shopping center in a black-majority neighborhood in Jackson. Shortly afterwards, the shooter committed suicide at a nearby abandoned restaurant. |
| February 9, 1996 | Fort Lauderdale, Florida | 5 | 1 | 6 | A fired 41-year-old man returned to his workplace and shot six, killing five, before committing suicide. |
| February 2, 1996 | Moses Lake, Washington | 3 | 1 | 4 | Frontier Middle School shooting: A student shot and killed a teacher and two students and wounded another before being arrested. |
| December 19, 1995 | New York City, New York | 5 | 3 | 8 | A man shot five people to death in a shoe store in the Pelham Parkway section of The Bronx because the store didn't have the size 13 1/2 boots he desired. The gunman was then shot and injured by police before getting apprehended. |
| November 7, 1995 | Boston, Massachusetts | 4 | 1 | 5 | Two individuals opened fire when people were eating lunch, killing four. |
| October 12, 1995 | Blackville, South Carolina | 2 | 1 | 3 | Blackville–Hilda High School shooting A 16-year-old boy shot and killed a teacher and injured another teacher before committing suicide at Blackville–Hilda High School. |
| July 20, 1995 | Los Angeles, California | 4 | 0 | 4 | An electrician shot and killed four people at a Downtown Los Angeles technical center before surrendering to police. |
| April 28, 1995 | Littleton, Colorado | 3 | 1 | 4 | A man opened fire at an Albertsons supermarket, killing three people (including his wife and a police officer) and wounding one. The shooter was subdued and arrested. |
| April 3, 1995 | Corpus Christi, Texas | 6 | 0 | 6 | A man walked into Walter Rossler Co. and killed five people before turning the gun on himself. |
| March 22, 1995 | Montclair, New Jersey | 4 | 1 | 5 | A man killed four people and injured one during a robbery at a post office, and was later sentenced to life in prison. |
| November 22, 1994 | Washington DC | 4 | 1 | 5 | A 25-year-old man shot four police officers at a police station, killing three, before committing suicide. |
| November 7, 1994 | Wickliffe, Ohio | 1 | 4 | 5 | Wickliffe Middle School shooting: A 37-year-old former student entered the building and shot and killed the custodian and wounded three other adults before he was arrested. |
| October 23, 1994 | Los Angeles, California | 3 | 6 | 9 | Nine people were shot, three of them fatally, in a gang-related South Los Angeles shooting. |
| June 20, 1994 | Fairchild Air Force Base, Washington | 5 | 22 | 27 | Fairchild Air Force Base shooting: A former airman who had been discharged returned to the base hospital and killed four people and injured twenty-two people before being shot and killed by responding police. |
| April 16, 1994 | Gadsden, Alabama | 3 | 1 | 4 | 1994 Popeyes shooting: The perpetrators shot and killed three employees and injured one during a robbery. |
| March 15, 1994 | Santa Fe Springs, California | 4 | 2 | 6 | A fired employee shot and killed three people and wounded two others at a manufacturing plant before committing suicide. |
| January 30, 1994 | Clarksville, Tennessee | 4 | 0 | 4 | A 19-year-old employee at a Taco Bell shot four co-workers and stole $3,000. |
| December 17, 1993 | Hugo, Oklahoma | 3 | 3 | 6 | A 39-year-old man, upset that his dog was shot, killed two people and injured three others in a parking lot and committed suicide. |
| December 14, 1993 | Aurora, Colorado | 4 | 1 | 5 | Aurora, Colorado, Chuck E. Cheese shooting: The perpetrator shot and killed four employees and injured one in revenge for being fired from the restaurant. |
| December 7, 1993 | Long Island, New York | 6 | 19 | 25 | Long Island Rail Road shooting: A passenger opened fire on other passengers and killed six and wounded nineteen before being subdued by three passengers and arrested. |
| December 3, 1993 | Oxnard, California | 5 | 0 | 5 | A man shot and killed three workers of an unemployment office. Afterwards he fled the scene and killed a pursuing officer before getting slain by other police officers outside a second unemployment office. |
| September 16, 1993 | The Bronx, New York | 4 | 3 | 7 | Four people were killed and three injured during a shooting in a Bronx apartment over a relationship feud. |
| July 1, 1993 | San Francisco, California | 9 | 6 | 15 | 101 California Street shooting: The perpetrator opened fire in an office building, killing eight people and wounding six others before committing suicide. |
| February 14, 1993 | The Bronx, New York | 6 | 0 | 6 | An 18-year-old man killed six people during a drug-related shooting in a Bronx apartment. |
| January 25, 1993 | Langley, Virginia | 2 | 3 | 5 | CIA Headquarters shooting: A Pakistani national fired an AK-47 style weapon at a line of cars waiting at a red light to turn into the main entrance of the CIA Headquarters. He was captured in 1997. |
| January 18, 1993 | Grayson, Kentucky | 2 | 0 | 2 | East Carter High School shooting: Scott Pennington shot his teacher and a janitor, held his classmates hostage for a while, then surrendered to police. |
| January 8, 1993 | Palatine, Illinois | 7 | 0 | 7 | Brown's Chicken Massacre: Two robbers entered a Brown's Chicken restaurant and murdered seven employees. The two were arrested and convicted in 2007 and 2009. |
| December 19, 1992 | Milwaukee, Wisconsin | 4 | 0 | 4 | A man shot four teenage girls to death in a dispute between two drug houses. |
| December 14, 1992 | Great Barrington, Massachusetts | 2 | 4 | 6 | 1992 Bard College at Simon's Rock shooting: The perpetrator, Wayne Lo, had been stockpiling ammunition and weapons in his dorm, and after several alarms had been raised by third parties, he opened fire and killed a professor and student and wounded four others. |
| June 20, 1992 | Houston, Texas | 4 | 2 | 6 | Brownstone Lane murders: The perpetrators shot and killed four people and injured two at a residence in Houston, Texas. |
| May 1, 1992 | Olivehurst, California | 4 | 10 | 14 | Lindhurst High School Shooting and Hostage Situation (1992): A 20-year-old past student opened fire on a classroom and killed four people, wounded ten others, and held eighty people hostage during an eight-hour siege before he surrendered. |
| December 16, 1991 | New York City, New York | 3 | 2 | 5 | Three were killed and two others were wounded when two males started shooting in the Mott Haven neighborhood in The Bronx. Four police officers were injured when two squad cars collided with each other after a victim ran into the street. |
| December 6, 1991 | Austin, Texas | 4 | 0 | 4 | 1991 Austin yogurt shop killings: Four teenage girls were shot and killed at the Austin "I Can't Believe It's Yogurt!" shop. The case remains unsolved as of July 2023. |
| November 14, 1991 | Royal Oak, Michigan | 6 | 5 | 11 | Royal Oak post office shootings: A gunman shot and killed five people and wounded five others at a post office before killing himself. |
| November 1, 1991 | Iowa City, Iowa | 6 | 1 | 7 | University of Iowa shooting: A former graduate student attended a meeting for a research group before opening fire and killed five individuals and injured one before committing suicide. |
| October 16, 1991 | Killeen, Texas | 24 | 27 | 51 | Killeen, Texas, Luby's Restaurant shooting: A former Merchant Marine drove his vehicle through the front window of the restaurant before opening fire on a crowd of about eighty people, killing twenty-three and injuring twenty-seven before committing suicide. |
| April 23, 1991 | Washington D.C. | 3 | 0 | 3 | Three people were fatally shot during an argument at a drug deal. Benito Valdez was sentenced to 93-years-to-life for the crime in May 2018. |
| April 4, 1991 | Sacramento County, California | 6 | 14 | 20 | Sacramento Hostage Crisis: For eight hours forty-one people were held hostage inside an electronics store, by four Vietnamese refugees who killed three and injured 14. Three of the four perpetrators were shot and killed by responding police. |
| March 7, 1991 | Detroit, Michigan | 2 | 2 | 4 | |
| January 26, 1991 | Chimayo, New Mexico | 7 | 0 | 7 | |
| August 9, 1990 | Waddell, Arizona | 9 | 0 | 9 | Arizona Buddhist Temple shooting: Nine men were robbed and shot to death in a Buddhist temple, with the perpetrator remaining un-convicted until 2014. |
| July 17–18, 1990 | Jacksonville, Florida | 12 | 6 | 18 | GMAC Office shooting: A convicted felon returned to the loan office he had used to purchase a car and opened fire, killing eleven people and injuring six before committing suicide. |
| April 4, 1990 | Detroit, Michigan | 6 | 0 | 6 | An 18-year-old woman killed six people during a robbery at a drug house in Detroit. |
| February 10, 1990 | Las Cruces, New Mexico | 5 | 2 | 7 | Las Cruces bowling alley massacre: Two unknown perpetrators entered the bowling alley and killed four people and injured three before fleeing. Though one victim later died from their injuries in 1999. The case is still unsolved. |

### 1980s

| Date | Location | Dead | Injured | Total | Description |
| September 14, 1989 | Louisville, Kentucky | 9 | 12 | 21 | Standard Gravure shooting (1989): A 47-year-old pressman killed eight people and injured twelve at his former workplace, Standard Gravure, before committing suicide. |
| January 17, 1989 | Stockton, California | 6 | 32 | 38 | Cleveland Elementary School shooting: A drifter used a semi-automatic rifle to kill five children and wound thirty-two other students and teachers on the school playground before committing suicide. |
| September 26, 1988 | Greenwood, South Carolina | 2 | 9 | 11 | Oakland Elementary School shooting: The perpetrator shot and killed two eight-year-old students and wounded nine others (seven students, a teacher, and a gym coach) in the school's cafeteria and a classroom before being arrested. He was sentenced to death. |
| July 17, 1988 | Winston-Salem, North Carolina | 4 | 6 | 10 | Old Salisbury Road shooting: The perpetrator shot nine passers-by from the center line on the road, killing four and injuring five before being arrested. |
| May 20, 1988 | Winnetka, Illinois | 2 | 6 | 8 | Attacks by Laurie Dann: The perpetrator entered the Hubbard Woods Elementary School and killed one student and wounded five others before entering a home and holding the inhabitants hostage before committing suicide. |
| February 16, 1988 | Sunnyvale, California | 7 | 4 | 11 | ESL shooting: After stalking his coworker, the perpetrator entered the ESL building with several weapons and shot at employees and bystanders, killing seven people and wounding four before surrendering to police and SWAT officers. |
| December 7, 1987 | Cayucos, California | 43 | 0 | 43 | Pacific Southwest Airlines Flight 1771 (1987) The perpetrator David Burke entered the cockpit of Pacific Southwest Airlines Flight 1771 and killed the pilot and co-pilot as well as shooting three other people before crashing the plane and killing all forty-three passengers and crew on board. |
| September 25, 1987 | Elkland, Missouri | 7 | 0 | 7 | A man killed seven members of his family. |
| July 12, 1987 | Tacoma, Washington | 8 | 0 | 8 | A man killed multiple members of his family before dying of a self-inflicted gunshot wound. |
| April 23, 1987 | Palm Bay, Florida | 6 | 10 | 16 | 1987 Palm Bay shooting: A 59-year-old man shot sixteen people, killing six, at two shopping centers. |
| August 20, 1986 | Edmond, Oklahoma | 15 | 6 | 21 | Edmond post office shooting: A part-time employee entered to begin his day before locking the doors and killing fourteen coworkers and injuring six others before committing suicide. |
| October 30, 1985 | Springfield, Pennsylvania | 3 | 7 | 10 | Springfield Mall shooting: The perpetrator fired first at customers outside the Springfield Mall, and then moved inside and killed three and wounded seven before she was disarmed. |
| October 18, 1985 | Detroit, Michigan | 0 | 6 | 6 | Murray-Wright High School shooting: During half-time at a football game, the perpetrator opened fire with a shotgun on individuals that he had earlier fought with and wounded six. |
| December 22, 1984 | New York City, New York | 0 | 4 | 4 | 1984 New York City subway shooting: Four teenagers were shot and wounded by the perpetrator on a New York subway train. |
| August 31, 1984 | Los Angeles, California | 4 | 0 | 4 | A family of four were fatally shot in their South Los Angeles home. A suspect was arrested, charged and sentenced to death for the incident. |
| July 24, 1984 | Hot Springs, Arkansas | 5 | 2 | 7 | After a traffic stop, the perpetrator engaged in a gun fight with the officer, injuring each other. Despite being wounded, the shooter then entered a motel bar and fatally shot four people while injuring another before dying. |
| July 18, 1984 | San Diego, California | 22 | 19 | 41 | San Ysidro McDonald's massacre: A male suspect entered a busy McDonald's and opened fire with an Uzi, shotgun and semiautomatic pistol, and killed twenty-one people and injured nineteen before being killed by a police sniper. |
| June 24, 1984 | Dallas, Texas | 6 | 1 | 7 | 1984 Dallas nightclub shooting: After being rejected by a woman on the dance floor, a man opened fire, killing six and injuring one. |
| April 15, 1984 | Brooklyn, New York City, New York | 10 | 0 | 10 | Palm Sunday massacre: During a believed home invasion ten people—three adults, one teenager, and six children—were killed. An infant was left unharmed. |
| February 24, 1984 | Los Angeles, California | 3 | 12 | 15 | 49th Street Elementary School shooting: The perpetrator fired on children in a school playground from his home across the street, and killed two individuals and injured twelve others before committing suicide. |
| February 19, 1983 | Seattle, Washington | 13 | 1 | 14 | Wah Mee massacre: Three perpetrators entered a gambling club at the Louisa Hotel during a robbery and killed thirteen people and wounded one in an attempt to leave no witnesses. |
| September 25, 1982 | Wilkes-Barre, Pennsylvania and Jenkins Township, Pennsylvania | 13 | 1 | 14 | Murders by George Banks: The perpetrator used an AR-15 to shoot and kill thirteen people and injure one in his home and the home of a former girlfriend. A four-hour standoff occurred before officers were able to arrest and hold him on several charges. |
| August 20, 1982 | Miami, Florida | 8 | 3 | 11 | Welding shop shooting: A teacher opened fire inside a welding shop, killing eight people and injuring three before attempting to flee by bicycle; he was run down as he cycled away. |
| May 3, 1982 | Russian Jack Springs Park, Anchorage, Alaska | 4 | 0 | 4 | Russian Jack Springs Park shooting: A schizophrenic man left a psychiatric hospital on a day pass and killed four teenagers in a park before being arrested. |
| May 7, 1981 | Salem, Oregon | 5 | 18 | 23 | Oregon Museum Tavern shooting: The perpetrator entered the location and fired, killing five people and injuring eighteen before he was wrestled to the ground. |
| March 30, 1981 | Washington D.C. | 1 | 3 | 4 | Attempted assassination of Ronald Reagan: John Hinckley Jr. attempted to kill President Ronald Reagan as to impress actress Jodie Foster, who he was infatuated with. Reagan was shot but survived, as did Secret Service agent Tim McCarthy and police officer Thomas Delahanty. Press Secretary James Brady was also shot, but he suffered permanent brain damage as a result, and his death in 2014 was ruled a homicide. |
| June 22, 1980 | Daingerfield, Texas | 5 | 11 | 16 | Daingerfield church shooting: The perpetrator killed five people and wounded ten others after they had declined to be character witnesses in the trial of him raping his daughter. |

### 1970s

| Date | Location | Dead | Injured | Total | Description |
| November 3, 1979 | Greensboro, North Carolina | 5 | 12 | 17 | Greensboro Massacre (1979): Members of the Communist Workers Party and others demonstrated against the KKK and the American Nazi Party, the event dissolved into a gunfight in which five people were killed and about twelve people were wounded. |
| January 29, 1979 | San Diego, California | 2 | 9 | 11 | Cleveland Elementary School shooting: A 16-year-old girl who lived across the street shot and killed two people and injured nine others before being arrested. |
| July 16, 1978 | Oklahoma City, Oklahoma | 6 | 0 | 6 | Roger Dale Stafford entered a Sirloin Stockade restaurant with his wife and brother intending to rob it; the three then waited until closing time and proceeded to order six employees into the freezer, whom Stafford then shot execution-style. |
| June 28, 1978 | Boston, Massachusetts | 5 | 0 | 5 | Blackfriars massacre: Four known criminals and a former Boston television investigative news anchorman and reporter were all killed in a supposed sale of cocaine. |
| September 4, 1977 | San Francisco, California | 5 | 11 | 16 | Golden Dragon massacre: Five members of a Chinese youth gang attempted to kill rival gang members, which quickly turned into a shootout in which five people died and eleven were injured. |
| July 27, 1977 | Carol City, Florida | 6 | 2 | 8 | Carol City massacre: Three perpetrators tied up eight people in a drug house and shot all of them, killing six and wounding two. |
| July 12, 1976 | Fullerton, California | 7 | 2 | 9 | California State University, Fullerton massacre: A custodian at the university killed seven people and wounded two others before fleeing the school. He was arrested. |
| March 30, 1975 | Hamilton, Ohio | 11 | 0 | 11 | Easter Sunday Massacre: The perpetrator shot and killed his mother, brother, sister-in-law, and eight nieces and nephews in five minutes before calling police and being arrested. |
| December 30, 1974 | Olean, New York | 3 | 11 | 14 | 1974 Olean High School shooting: A student locked himself in a third floor room before shooting out the window, killing three people and injuring eleven before being subdued with tear gas and arrested. |
| November 14, 1974 | Amityville, New York | 6 | 0 | 6 | Ronald DeFeo Jr. Family Murders (1974): Basis for The Amityville Horror, where the perpetrator was convicted for the killing of his parents and siblings, six people in all. |
| January 18, 1973 | Washington D.C. | 7 | 2 | 9 | Hanafi Murders: Three individuals were shot and killed, while two others were wounded, and four children drowned in an attack by six men. |
| December 31, 1972 – January 7, 1973 | New Orleans, Louisiana | 10 | 13 | 23 | Howard Johnson's shooting: Over the course of ten hours and in several locations the perpetrator, having previously killed two police officers and wounded a third, killed seven people and injured ten before being shot and killed by police. |
| September 6, 1972 | St. Croix, U.S. Virgin Islands | 8 | 8 | 16 | Fountain Valley massacre: Five robbers attacked guests (and employees) at a Virgin Islands golf club frequented by tourists. The leader also harbored political and racial animosity arising out his perception of the Islands' colonial history. All were sentenced to life terms, although the leader escaped after hijacking an airplane to Cuba, and one defendant's sentence was commuted after 22 years. |
| November 9, 1971 | Westfield, New Jersey | 5 | 0 | 5 | Murders by John List: John List shot and killed his wife, mother and three teenage children in a belief that he needed to save their souls through death, he was arrested in 1989 after living under an assumed name after a neighbor recognized him from America's Most Wanted. |
| June 14, 1971 | Detroit, Michigan | 8 | 0 | 8 | Hazelwood massacre Eight people were shot to death in a house on Hazelwood Street in Detroit. The massacre remains unsolved. |
| August 7, 1970 | San Rafael, California | 4 | 2 | 6 | Marin County Civic Center attacks: The 17-year-old perpetrator took hostages in a court room in an attempt to coerce the release of the Soledad Brothers. Three prisoners released during the siege joined him in the attack, which left the main perpetrator dead along with three others and two others wounded. |
| May 15, 1970 | Jackson, Mississippi | 2 | 12 | 14 | Jackson State University shooting: After responding to the university due to a growing unrest, officers opened fire on a dorm building and two students (one from a local high school) were killed and twelve were injured. |
| May 4, 1970 | Kent State University at Kent, Ohio | 4 | 9 | 13 | Kent State shootings: During a protest of the bombing of Cambodia at the university, members of the Ohio National Guard opened fire, killing four and injuring nine people. |

### 1960s

| Date | Location | Dead | Injured | Total | Description |
| May 21–25, 1969 | Greensboro, North Carolina | 2 | 27 | 29 | 1969 Greensboro uprising: Student protestors, police officers and members of the National Guard exchanged gunfire on the campuses of James B. Dudley High School and North Carolina Agricultural and Technical State University, due to civil rights issues. Two were killed and twenty-seven injured. |
| July 23–24, 1968 | Cleveland, Ohio | 6 | 12 | 18 | Glenville shootout: A gun battle between the Cleveland Police Department and the Black Nationalists of New Libya led to six people being killed and at least twelve injured, and sparked the Glenville Riots. |
| June 25, 1968 | Lake Michigan, Good Hart, Michigan | 6 | 0 | 6 | Robison family murders: While vacationing, a family was shot and killed, with the parents also bludgeoned with a hammer. The investigation continued for fifteen months after the bodies were discovered. |
| February 8, 1968 | Orangeburg, South Carolina | 3 | 27 | 30 | South Carolina State University shooting: After responding to the scene of about 200 protestors protesting racial segregation, after an officer was assaulted, officers began to shoot into the crowd; three people were killed and twenty-seven injured. |
| November 12, 1966 | Mesa, Arizona | 5 | 2 | 7 | 1966 Rose-Mar College of Beauty shooting: A man shot and killed five people in the Rose-Mar College of Beauty in Mesa, Arizona, including four women and a toddler. He later told police he was inspired by the University of Texas tower shooting and Richard Speck's spree killing in Chicago earlier the same year. |
| August 1, 1966 | University of Texas, at Austin, Texas | 17 | 31 | 48 | University of Texas tower shooting: A student and former Marine sharpshooter killed his wife and mother before using the University of Texas clock tower as a sniper's nest to kill 15 people, including a pregnant woman, and wound 31 before being killed by police. |
| April 25, 1965 | Orcutt, California | 4 | 10 | 14 | 1965 Highway 101 sniper attack: A 16-year-old stole his father's military rifle and shot at automobiles driving down the highway, killing two and injuring eleven before committing suicide. A third victim died later at the hospital. |
| February 18, 1963 | Green Bay, WI | 5 | 0 | 5 | A 15-year-old boy fatally shot five members of his family at their residence. |

### 1950s

| Date | Location | Dead | Injured | Total | Description |
| December 19, 1959 | Osprey, Florida | 4 | 0 | 4 | Walker family murders: Four members of the Walker family were fatally shot inside their house in Osprey, Florida. The perpetrator remains unknown. |
| March 1, 1954 | Washington D.C. | 0 | 5 | 5 | 1954 United States Capitol shooting: Four Puerto Rican nationalists shot from the Ladies Gallery of the House of Representatives chamber and wounded five Representatives. |

### 1940s

| Date | Location | Dead | Injured | Total | Description |
| September 6, 1949 | Camden, New Jersey | 13 | 3 | 16 | 'Walk of Death' Killings by Howard Unruh: The perpetrator walked through his neighborhood for 12 minutes and killed thirteen; including three children, and injured three. |
| July 25, 1946 | Walton County, Georgia | 4 | 0 | 4 | Moore's Ford Lynching: Four young African Americans; two married couples were lynched by a white mob and were shot and killed. |
| July 8, 1945 | Salina, Utah | 9 | 19 | 28 | Utah Prisoner of War Massacre: Nine German POWs were killed and nineteen wounded by an American Army Private who shot at them while on guard duty. |

### 1930s

| Date | Location | Dead | Injured | Total | Description |
| November 9, 1934 | Kelayres, Pennsylvania | 5 | 12–25 | 17–30 | Kelayres Massacre: An election-eve parade and rally was shot at as it passed by the home of the local Republican boss, three victims died and between twelve and twenty-five were wounded. |
| September 8, 1933 | Belfast, Maine | 5 | 0 | 5 | 1933 Belfast shooting: A gunman shot four men to death on the street before fatally shooting himself in a blacksmith shop. |
| June 17, 1933 | Kansas City, Missouri | 5 | 3 | 8 | Kansas City Massacre: Four law enforcement officers and a fugitive were killed, with three law enforcement officers wounded in a shootout between the two groups. |
| March 6, 1933 | Cleveland, Ohio | 6 | 6 | 12 | 1933 Cleveland shootings: A mentally ill man shot five people to death and injured six others before being shot to death by police. |
| January 2, 1932 | Brookline, Missouri | 6 | 0 | 6 | Young Brothers massacre: Two criminals shot and killed six police officers during an attempted arrest. |

### 1920s

| Date | Location | Dead | Injured | Total | Description |
| February 14, 1929 | Chicago, Illinois | 7 | 0 | 7 | Saint Valentine's Day Massacre: Seven members and associates of Chicago's North Side Gang were shot and killed execution-style against a garage wall. |
| September 9, 1924 | Hanapepe, Hawaii | 20 | 0 | 20 | Hanapepe Massacre: During a strike of Filipino sugar workers, in an attempt to rescue two hostage strikebreakers police killed 16 strikers, while strikers killed four law enforcement members. |
| June 21–22, 1922 | Herrin, Illinois | 23 | 0 | 23 | Herrin Massacre: During a United Mineworkers of America nationwide strike union, miners shot at strikebreakers working at the mine. The mines guards killed three union miners on June 21, and the miners killed 20 strikebreakers and guards on June 22. |

### 1900s

| Date | Location | Dead | Injured | Total | Description |
| August 13, 1903 | Winfield, Kansas | 10 | 25 | 35 | Winfield massacre: Nine people were fatally shot at a concert by Army veteran Gilbert Twigg, who then committed suicide to avoid apprehension. |