==1950==
17 November 1950 Gloucester County NJ, 5 killed (shot) (http://murderpedia.org/male.I/i/ingenito-ernest.htm)
==1951==
2 May 1951 Collettsville NC, 9 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1953==
15 April 1953 Lawrence MA, 9 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1955==
1 November 1955 over Colorado 44 killed (bomb) (http://murderpedia.org/male.G/g/graham-john-gilbert.htm)
==1956==
28 January 1956 Troy Hills NJ, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
2 October 1956 Clinton NC, 7 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1959==
4/5 March 1959 Lancaster OH, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
15 September 1959 Houston TX, 6* killed (bomb) (http://murderpedia.org/male.O/o/orgeron-paul-harold.htm)
16 November 1959 over the Gulf of Mexico, 42 killed (possibly a bomb) (https://en.wikipedia.org/wiki/National_Airlines_Flight_967) unsolved
19 December 1959 Osprey FL 4 killed (shot) (https://en.wikipedia.org/wiki/Walker_family_murders) (unsolved)
==1960==
6 January 1960 Over Brunswick County NC, 34 killed (bomb) (http://murderpedia.org/male.F/f/frank-julian-andrew.htm)
==1961==
13 May 1961 Lockport IL, 7 killed (assault) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1962==
6 May 1962 Zion IL, 7 killed (assault) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
22 May 1962 Over Putman County MO, 45 killed (bomb) (http://murderpedia.org/male.D/d/doty-thomas.htm)
==1963==
(Birmingham Church bombings had two killers)
17 June 1963 Prospect PA, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
17 September 1963 near Chualar CA 32 killed (vehicular homicide) (https://en.wikipedia.org/wiki/Chualar_bus_crash)
==1964==
7 May 1964 over San Ramon CA, 45 killed (vehicular homicide – Airplane) (http://murderpedia.org/male.G/g/gonzales-francisco-paula.htm)
29 September 1964 Troy MI, 7 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
3 December 1964 Detroit MI, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1965==
25 January 1965 Ferndale MI 7 killed (arson) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
25 April 1965, near Orcutt CA, 4 killed (shot) (https://en.wikipedia.org/wiki/1965_Highway_101_sniper_attack)
13 August 1965 Bay View OH, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
22 November 1965 Aiea HI, 5 killed (drowned) (http://murderpedia.org/female.Y/y/young-maggie.htm)
==1966==
13 July 1966 Chicago IL, 8 killed (multiple) (https://en.wikipedia.org/wiki/Richard_Speck)
1 August 1966 Austin TX, 16 killed (shot) (http://murderpedia.org/male.W/w/whitman-charles.htm)
12 November 1966 Mesa AZ, 5 killed (shot) (https://en.wikipedia.org/wiki/List_of_school_shootings_in_the_United_States)
==1967==
7 January 1967 Las Vegas NV, 6 killed (bomb) (https://lasvegassun.com/news/1967/jan/08/fbi-combs-blast-ruins/)
5 April 1967 Ithaca New York (Cornell university) 9 killed (arson) (https://medium.com/@TheMaxDenning/an-ivy-league-arson-50-years-later-e8b327cd0e5c)
15 April 1967 Circleville OH 6* killed (bomb)( https://www.dispatch.com/news/20170415/bombing-in-67-rocked-united-circleville)
17 August 1967, Saint Cloud MN 4 killed (arson) (http://www.nydailynews.com/news/crime/unfaithful-minn-husband-kills-wife-4-kids-1967-blaze-article-1.3445978)
23 October 1967 Lock Haven PA, 6 killed (shot) (http://murderpedia.org/male.H/h/held-leo.htm)
==1968==
16 March 1968 Ironwood MI, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
18 December 1968 Carlinville IL, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
19 December 1968 Napa CA, 7 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1969==
5 April 1969 Harrisburg PA, 4 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
==1970==
19 October 1970 Santa Cruz CA, 5 killed (shot) (http://murderpedia.org/male.F/f/frazier-john-linley.htm)
==1971==
9 November 1971 Westfield NJ 5 killed (shot) (http://murderpedia.org/male.L/l/list-john-emil.htm)
==1972==
6 February 1972 Pierce County WA, 4 killed (shot) (http://murderpedia.org/male.C/c/clemmons-maurice.htm)
17 February 1970 4 killed (including unborn child) (stabbed) (http://murderpedia.org/male.M/m/macdonald-jeffrey.htm)
29 May 1972 Raleigh NC, 5 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
21 June 1972 Cherry Hill NJ, 7 killed (shot) (http://murderpedia.org/male.G/g/grace-edwin-james.htm)
==1973==
22 April 1973 Los Angeles CA, 7 killed (shot) (https://en.wikipedia.org/wiki/William_Ray_Bonner)
14 May 1973 Seminole County GA, 6 killed (shot) (http://murderpedia.org/male.I/i1/isaacs-carl-junior.htm)
22 May 1973 Los Angeles CA 7 killed (shot) (http://murderpedia.org/male.B/b/bonner-william-ray.htm)
8/9 June 1973 Boston MA 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
24 June 1973 New Orleans LA, 32 killed (arson) (https://en.wikipedia.org/wiki/UpStairs_Lounge_arson_attack) unsolved
==1974==
15 January 1974, Wichita KS, 4 killed (multiple) (https://en.wikipedia.org/wiki/Dennis_Rader#Evaluation_by_Robert_Mendoza)
10-11 May 1974 McLennan/Collin Counties TX 4 killed (shot) (http://murderpedia.org/male.W/w1/white-robert-excell.htm) unusual as a machinegun was used.
After 1 September 1974 near Copper OR, 4 killed (multiple) (https://en.wikipedia.org/wiki/Cowden_family_murders) unsolved, one suspect
==1975==
30 March 1975 Hamilton OH, 11 killed (shot) (https://en.wikipedia.org/wiki/James_Ruppert)
1 November 1975 Black Hawk County IA 4 killed (shot) (http://murderpedia.org/male.M/m/mark-jerry.htm)
13 November 1975 Amityville NY, 6 killed (shot) (http://murderpedia.org/male.D/d/defeo-ronald.htm)
4 December 1975 Orange County FL (shot) (http://murderpedia.org/male.Z/z/zeigler-william.htm)
24 December 1975 Orange County FL, 4 killed (shot) (http://murderpedia.org/male.Z/z/zeigler-william.htm)
29 December 1979 (bomb) 11 killed (https://en.wikipedia.org/wiki/1975_LaGuardia_Airport_bombing) unsolved
==1976==
1 March 1976, Bethesda MD, 5 killed (multiple) (https://en.wikipedia.org/wiki/Bradford_Bishop)
12 March 1976 Bucks County PA, 6 killed (shot) (http://murderpedia.org/male.G/g/geschwendt-george.htm)
12 July 1976, Fullerton CA, 7 killed (shot) (https://en.wikipedia.org/wiki/California_State_University,_Fullerton_massacre)
October 1976 Bronx NY, 27 killed (arson) (http://www.nytimes.com/1976/10/25/archives/fire-sweeps-bronx-social-club-leaving-25-dead-and-24-injured.html)
==1977==
14 February 1977 New Rochelle NY, 7 killed (shot) (http://murderpedia.org/male.C/c/cowan-frederick.htm)
22 July 1977 Prospect CT, 9 killed (beating/multiple) (http://murderpedia.org/male.A/a/acquin-lorne.htm)
27 July 1977 Miami-Dade County FL 6 killed (shot) (http://murderpedia.org/male.W/w1/white-beauford.htm)
23 July 1977 Klamath Falls OR, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas)) Total includes unborn child
14 August 1977 Terrebonne Parish LA 4 killed (shot) (http://murderpedia.org/male.M/m1/martin-david-dene.htm)
26 August 1977 Hackettstown NJ, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
15 September 1977 Climax Springs MO, 4 killed (shot) (http://www.lakeexpo.com/news/top_sto...e261211e4.html)
4 December 1977 Cochise County AZ, 4 killed (stabbed) (http://murderpedia.org/male.C/c1/clark-james-dean.htm)
==1978==
7 January 1978 Rockford IL 6 killed (multiple) (http://murderpedia.org/male.N/n/nelson-simon-peter.htm)
17 June 1978 Warwick RI 5 killed (multiple) (https://www.nytimes.com/1978/06/18/archives/cafe-shooting-leaves-five-dead.html)
One died of a heart attack. One pregnant woman killed
28 June 1978 Boston MA 5 killed (shot) (https://en.wikipedia.org/wiki/Blackfriars_massacre) (Unsolved, three attackers, but unknown number of killers)
17 July 1978 Buffalo NY, 4 killed (stabbed) (http://murderpedia.org/female.T/t/trait-gail.htm)
3 August 1978 Salt Lake City UT, 7 killed (multiple) (http://murderpedia.org/female.B/b/braxton-nadia.htm)
17 November 1978 Speedway IN 4 killed (Multiple) (Unsolved)( https://en.wikipedia.org/wiki/Burger_Chef_murders) probably two killers
26 November 1978 10 killed Greece NY, (arson) (https://en.wikipedia.org/wiki/1978_Holiday_Inn_fire) unsolved
==1979==
==1980==
8 January 1980 Dade County FL, 4 killed (multiple) (http://murderpedia.org/male.B/b1/bolender-bernard.htm)
14 January 1980 Vandenburgh County IN, 4 killed (shot) (http://murderpedia.org/male.W/w1/wallace-donald-ray.htm)
3 February 2018 EL Paso TX, 5 killed (shot) (https://www.caller.com/story/news/local/texas/state-bureau/2018/05/18/mass-shootings-texas-history/623798002/)
22 June 1980, Daingerfield TX, 5 killed (shot) (https://en.wikipedia.org/wiki/Daingerfield_church_shooting)
1 July 1981 Los Angeles CA, 4 killed (beaten) (https://en.wikipedia.org/wiki/Wonderland_murders) unsolved
21 July 1980 Coraopolis PA 5 Killed (shot) (https://www.upi.com/Archives/1981/08/20/The-closest-friend-in-the-Army-of-accused-sniper/1977367128000/)
3 August 1980 El Paso TX 5 killed (shot) (https://www.caller.com/story/news/local/texas/state-bureau/2018/05/18/mass-shootings-texas-history/623798002/)
20 September 1980 Olathe KS, 6 killed (bomb) (http://murderpedia.org/male.C/c/crump-danny.htm)
23 October 1980 Saint Louis County MO, 4 killed (shot) (http://murderpedia.org/male.B/b1/byrd-maurice-oscar.htm)
27 November 1980 Reno NV, 6 killed (vehicular homicide) (http://murderpedia.org/female.F/f/ford-priscilla.htm)
==1981==
3 January 1981 Delmar IA, 7 killed (shot) (http://murderpedia.org/male.G/g/gilbert-james-gene.htm)
11 April 1981 Keddie CA, 5 killed (stabbing) (https://en.wikipedia.org/wiki/Keddie_murders) unsolved
2 May 1981 Clinton MD, 6 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
3 May 1981 Anchorage AK 5 killed (shot) (https://en.wikipedia.org/wiki/Charles_L._Meach)
7 May 1981 Salem OR, 4 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
6 July 1981 Syracuse NY, 7 killed (arson) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
16 August 1981 Allen KY 5 killed (shot) (https://www.upi.com/Archives/1981/10/16/A-gunman-burst-into-an-auto-parts-store-Friday/9402372052800/)
21 August 1981 Indianapolis IN, 6 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1982==
3 May 1982 Anchorage AK 4 killed (shot) (https://en.wikipedia.org/wiki/Charles_L._Meach)
7 August 1982 Craig AK, 8 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas)) Unsolved
9 August 1982 Grand Prairie TX 6 killed (shot) (https://en.wikipedia.org/wiki/John_Felton_Parish)
NB these two are not duplicates.
10 August 1982 Tarrant County TX 5 killed (shot) (http://murderpedia.org/male.R/r1/robison-larry.htm)
20 August 1982, Miami FL, 8 killed (shot) (https://en.wikipedia.org/wiki/Carl_Robert_Brown)
6 September 1982 Noyes Island AK 8 killed (shot?) (https://www.bellinghamherald.com/news/local/news-columns-blogs/dean-kahn/article73433607.html) Unsolved
25 September 1982 Wilkes-Barre PA, 13 killed (shot) (http://murderpedia.org/male.B/b/banks-george.htm)
7/8 November 1982 Paso Robles CA, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas)) (Suicide may not have been in the same ‘emotional event” but is counted here.)
==1983==
18 January 1983 Aplington IA, 5 killed (shot) (http://murderpedia.org/female.F/f/franken-ethel-mae.htm)
18 February 1983 Seattle WA 13 killed (shot) (http://murderpedia.org/male.N/n/ng-benjamin.htm)
1 March 1983 McCarthy AK, 6 killed (shot) (http://murderpedia.org/male.H/h/hastings-louis.htm)
4 June 1983 San Bernardino CA, 4 killed (stabbed) (http://murderpedia.org/male.C/c/cooper-kevin.htm)
1 July 1983 Harris County TX, 4 killed (stabbed) (http://murderpedia.org/male.W/w1/wilkerson-richard-james.htm)
6 September 1982 Blaine AK, 8 killed (shot) (http://www.bellinghamherald.com/news/local/news-columns-blogs/dean-kahn/article73433607.html)
8 October 1983 Grayson County TX, 4 killed (shot) (http://murderpedia.org/male.B/b/bower-lester-leroy.htm)
11 October 1983 College Station TX, 6 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
8 December 1983 Grayson County TX 4 killed (shot) (http://murderpedia.org/male.B/b/bonner-william-ray.htm)
==1984==
17 May 1984 Manley Hot Spring AK 9 killed (shot) (https://en.wikipedia.org/wiki/Michael_Silka)
15 April 1984 East New York NY, 10 killed (shot) (https://en.wikipedia.org/wiki/Palm_Sunday_massacre_(homicide))
29 June 1984 Dallas TX, 6 killed (shot) (http://murderpedia.org/male.B/b/belachheb.htm)
18 July 1984 San Ysidro CA, 21 killed (shot) https://en.wikipedia.org/wiki/San_Ysidro_McDonald%27s_massacre)
24 July 1984 Hot Springs AR 5* killed (shot) (https://www.upi.com/Archives/1984/07/25/A-gunman-who-killed-four-people-and-wounded-another/3627459576000/)
25 August 1984 Etowah County AL, 4 killed (shot) (http://murderpedia.org/male.F/f1/fortenberry-thomas.htm)
31 August 1984 Los Angeles CA, 4 killed (shot) (http://murderpedia.org/male.C/c/cox-tiequon.htm)
10 October 1984 South Pasadena CA 4 killed (arson) (http://murderpedia.org/male.O/o/orr-john-leonard.htm)
18 October 1984 Evansville IN 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
==1985==
28 January 1985 Reading PA 4 killed (arson) (http://www.wfmz.com/news/berks/man-re-sentenced-for-1985-fire-that-killed-4-at-reading-y/659511979)
30 June 1985 Orange County FL, 4 killed (stabbed) (http://murderpedia.org/male.C/c/correll-jerry-william.htm)
4 December 1985 Los Angeles CA 4 killed (arson) (unsolved) (http://articles.latimes.com/1985-12-05/news/mn-875_1_arson-caused)
15 December 1985 Springfield MA, 5 killed (arson) (http://murderpedia.org/male.C/c/carter-clarence-1.htm)
24 December 1985 Seattle WA, 4 killed (shot) (https://en.wikipedia.org/wiki/David_Lewis_Rice)
==1986==
17 May 1986 Colorado Springs CO, 6 killed (shot) (http://murderpedia.org/male.A/a/archibeque-gilbert.htm)
20 August 1986, Edmond OK, 15 killed (shot) (https://en.wikipedia.org/wiki/Edmond_post_office_shooting)
9 September 1986 Salina County MO 4 killed (shot) (http://murderpedia.org/male.R/r1/reese-donald.htm)
13 December 1986 Columbia County NY, 4 killed (shot) (http://murderpedia.org/male.G/g/gates-wyley.htm) killer was 17 years old
==1987==
4 January 1987 Chase MD 16 killed (DWI/train wreck) (https://en.wikipedia.org/wiki/1987_Maryland_train_collision)
23 April 1987 Palm Bay FL, 6 killed (shot) (http://murderpedia.org/male.C/c/cruse-william.htm)
12 July 1987 Tacoma WA, 8 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
15 September 1987 Amherst County VA 4 killed (shot) (http://murderpedia.org/male.B/b1/buchanan-douglas.htm
25 September 1987 Elkland MI, 7 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(familicides_in_the_United_States))
18 November 1987 Ina IL ,4 killed (multiple) (https://en.wikipedia.org/wiki/Dardeen_family_homicides) unsolved
7 December 1987 Over San Luis Obispo CA, 43* Killed (multiple) (http://murderpedia.org/male.B/b/burke-david.htm)
13 December 1987 Oklahoma City OK, 6 killed (shot) (http://newsok.com/article/2208864)
22 December 1987 Russellville AR 7 killed (multiple) (https://en.wikipedia.org/wiki/Ronald_Gene_Simmons)
26 December 1987 Dover AR 7 killed (multiple) (https://en.wikipedia.org/wiki/Ronald_Gene_Simmons)
30 December 1987 Algona IA, 7 killed (shot) (http://murderpedia.org/male.D/d/dreesman-robert.htm)
==1988==
16 February 1988, Sunnyvale CA, 7 killed (shot) (https://en.wikipedia.org/wiki/Richard_Farley)
18 February 1988 Rochester MN 4 killed (beaten) (http://murderpedia.org/male.B/b/brom-david-francis.htm)
15 April 1988 Bexar County TX 4 killed (stabbed) (http://murderpedia.org/male.N/n1/narvaiz-leopoldo.htm)
14 May 1988 Carrol County KY, 27 killed (DWI/Vehicular Homicide) (https://en.wikipedia.org/wiki/Carrollton_bus_collision)
17 July 1988, Winston-Salem NC, 4 killed (shot) (https://en.wikipedia.org/wiki/Old_Salisbury_Road_shooting)
20 September 1988 Escambia County FL, 4 killed (stabbed) (http://murderpedia.org/male.W/w/williams-ronald-lee.htm)
22 September 1988 Chicago IL 4 killed (shot) (https://www.nytimes.com/1988/09/23/us/chicago-man-kills-4-and-wounds-2-before-dying-in-a-shootout.html)
==1989==
3 February 1989 Lake County IN 4 killed (stabbed) (http://murderpedia.org/male.R/r/roark-dennis-ray.htm)
20 February 1989 Shenandoah County VA, 4 killed (shot) (http://murderpedia.org/male.E/e1/eaton-dennis-wayne.htm)
14 April 1989 Sonoma County CA, 7 killed (multiple) (13 December 1986 Columbia County NY, 4 killed (shot) (http://murderpedia.org/male.G/g/gates-wyley.htm) killer was 17 years old)
10 August 1989 Escondido CA 4* killed (shot) (http://murderpedia.org/male.T/t/taylor-john-merlin.htm)
14 September 1989, Louisville KY 9 killed (shot) (https://en.wikipedia.org/wiki/Standard_Gravure_shooting)
==1990==
2 February 1990 Alcorn MS, 4 killed (multiple) (http://murderpedia.org/male.C/c/carr-anthony.htm)
10 February 1990 Las Cruses NM, (shot) (https://en.wikipedia.org/wiki/Las_Cruces_bowling_alley_massacre) unsolved, two robbers/killers
25 March 1990 New York, NY, 87 killed (arson) (http://murderpedia.org/male.G/g/gonzalez-julio.htm) “Happyland Fire”
17/18 June 1990, Jacksonville FL, 5 killed (shot) (https://en.wikipedia.org/wiki/James_Edward_Pough) Counting only the 18 June mass killing. Otherwise, 12 killed.
1 November 1990 Leflore County MS, 4 killed (stabbed) (http://murderpedia.org/male.J/j/jackson-henry-curtis.htm)
==1991==
6 January 1991 Lehigh County CT, 4 killed (shot) (http://murderpedia.org/male.F/f/flood-david.htm)
26 January 1991 Chinmaya NM 7 killed (shot) (http://murderpedia.org/male.A/a/abeyta-ricky.htm)
26 January 1991 Dallas County TX 4 killed (shot) (http://murderpedia.org/male.S/s1/san-miguel-jessy.htm)
16 June 1991 Denver CO, 4 killed (shot) (https://en.wikipedia.org/wiki/Father%27s_Day_Bank_Massacre) unsolved
20 August 1991 Sarasota NY 5 killed (Vehicular Homicide/DWI) (https://www.nytimes.com/1991/08/21/nyregion/5-family-members-killed-in-truck-collision.html)
25 August 1991 Honolulu HI, 4 killed (multiple) (http://murderpedia.org/male.G/g/ganal-orlando.htm)
28 August 1991 New York NY 5 killed (Vehicular Homicide/DWI/Train) (https://en.wikipedia.org/wiki/1991_Union_Square_derailment)
9 October 1991 Concord NH (strangulation) (http://murderpedia.org/male.C/c/colbert-james.htm)
10 October 1991 Ridgewood NJ, 4 killed (multiple) (http://murderpedia.org/male.H/h/harris-joseph-m.htm)
16 October 1991, Killeen TX, 27 killed (shot) (https://en.wikipedia.org/wiki/Luby%27s_shooting)
19 October 1991 Concord NH, 4 killed (strangled) (http://murderpedia.org/male.C/c/colbert-james.htm)
1 November 1991 Iowa City IA 6* killed (shot) (https://en.wikipedia.org/wiki/University_of_Iowa_shooting)
4 November 1991 Royal Oak MI 5* killed (shot) (http://murderpedia.org/male.M/m/mcilvane-thomas.htm)
10 November 1991 Harrodsburg KY 5* killed (https://www.apnews.com/2ef3eeb1eb4f91024720120a176329c8)
17 November 1991 West Jordan UT, 4 killed (multiple) (http://murderpedia.org/female.K/k/kastanis-margaret.htm)
2 December 1991 Mahoning County OH, 4 killed (strangled) (http://murderpedia.org/male.W/w1/williams-willie-j.htm)
6 December 1991 Austin TX 4 killed (shot) (https://en.wikipedia.org/wiki/1991_Austin_yogurt_shop_murders) (Unsolved)
8-9 December 1991 Cooper & Moniteau Counties MO, 4 killed (shot) (http://murderpedia.org/male.J/j1/johnson-james-rodney.htm)
==1992==
26 January 1992 Hamilton County OH, 5 killed (arson) (http://murderpedia.org/male.G/g1/garner-william.htm)
15 February 1992 Bentley County AL, 4 killed (shot) (http://murderpedia.org/male.W/w1/williams-jason-oric.htm)
1 May 1992 Olivehurst CA, 4 killed (shot) (https://en.wikipedia.org/wiki/Lindhurst_High_School_shooting)
6 August 1992 Kent County DE 4 killed (stabbed)( http://murderpedia.org/male.L/l1/lawrie-david.htm)
18 August 1992 Tulsa OK, 4 killed (shot) (http://murderpedia.org/male.H/h1/hamilton-corey-duane.htm)
18 August 1992 Burleson County TX, 6 killed (Stabbing) (http://murderpedia.org/male.C/c1/carter-robert-earl.htm)
1 May 1992, Olivehurst CA, 4 killed (shot) (https://en.wikipedia.org/wiki/Lindhurst_High_School_shooting)
16 May 1992 Oklahoma City OK, 5 killed (stabbed) (http://murderpedia.org/male.H/h/hooks-danny-keith.htm)
20 June 1992 Harris County TX, 4 killed (shot) (http://murderpedia.org/male.D/d1/dudley-marion.htm)
7 July 1992, Baltimore MD 6 killed (arson) (http://www.baltimoresun.com/news/maryland/crime/bs-md-ci-tonya-lucas-retrial-preview-20170622-story.html#nws=true)
20 August 1992 Harris County TX, 4 killed (shot) (http://murderpedia.org/male.B/index.B.htm)
15 October 1992 Watkins Glen NY 5 killed (Shot) (https://www.apnews.com/20cc1c416bdef14d0971d278359bc1be)
8 November 1992 San Luis Obispo CA, 7 killed (shot) (http://murderpedia.org/male.D/d/drake-lynwood.htm)
13 November 1992 Harris County TX, 5 killed (suffocation) (http://murderpedia.org/male.C/c1/coulson-robert.htm)
==1993==
14 February 1993 Bronx, NY, 6 killed (shot) (http://murderpedia.org/male.C/c/casellas-anthony.htm)
14 June 1993 Norwalk IA, 6 killed (multiple) (http://murderpedia.org/male.F/f/forsyth-rick-wayne.htm)
1 July 1993 San Francisco CA, 9 killed (shot) (https://en.wikipedia.org/wiki/101_California_Street_shooting)
8 July 1993 Jackson MS 5 killed (shot) (NO FREAKING CITE!)
6 August 1993 Fayetteville NC, 4 killed (shot) (http://murderpedia.org/male.F/f/french-kenneth-junior.htm)
14 September 1993 Maricopa County AZ, 4 killed (shot) (http://murderpedia.org/male.D/d/djerf-richard.htm)
2 December 1993 Oxnard CA 4 killed (shot) (http://murderpedia.org/male.W/w/winterborne-alan.htm)
7 December 1993, Long Island NY, 6 killed (shot) (https://en.wikipedia.org/wiki/1993_Long_Island_Rail_Road_shooting)
14 December 1993, Aurora CO, 4 killed (shot) (https://en.wikipedia.org/wiki/1993_Aurora_shooting)
==1994==
30 January 1994 Montgomery County TN, 4 killed (shot) (http://murderpedia.org/male.H/h/housler-david-gene.htm)
4 April 1994 Richmond VA, 6 killed (shot) (http://murderpedia.org/male.G/g1/goins-christopher.htm)
4 June 1994 Tulsa OK 4 killed (shot) (http://murderpedia.org/male.T/t1/turrentine-kenneth.htm)
20 June 1994 Fairchild AFB WA, 5 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas)) Total includes an unborn child
24 June 1994 Fairchild AFB WA, 4 killed (aircraft suicide) (https://en.wikipedia.org/wiki/1994_Fairchild_Air_Force_Base_B-52_crash)
21 July 1994 Gregg County TX 4 killed (shot) (http://murderpedia.org/male.M/m1/mosley-daroyce-lamont.htm)
30 June 1994 Virginia Beach VA, 4 killed (shot) (http://murderpedia.org/male.C/c1/clagett-michael.htm)
29 August 1994 4 killed Roanoke County VA, (multiple) (http://murderpedia.org/male.B/b1/bramblett-earl.htm)
20 October 1994 Fairchild AFB WA 4 killed (shot) (http://historylink.org/File/8767)
==1995==
5 January 1995 Seattle WA, 4 killed (arson) (https://www.king5.com/article/news/crime/seattle-arsonist-martin-pang-who-set-1995-warehouse-fire-to-be-released-from-prison/281-558326898)
3 April 1995 Corpus Christie TX 5 killed 6* killed (shot) (http://murderpedia.org/male.S/s/simpson-james-daniel.htm)
18 April 1995 Redding CT 5 killed (arson) (http://murderpedia.org/male.F/f/ferguson-geoffrey.htm)
29 May 1995 Los Angeles CA 6* killed (arson) (http://murderpedia.org/male.M/m/morita-leonardo.htm)
21 March 1995 Montclair NJ, 4 killed (shot) (http://murderpedia.org/male.G/g/green-christopher.htm)
18 April 1995 Redding CT, 5 killed (arson) (http://murderpedia.org/male.F/f/ferguson-geoffrey.htm)
18 May 1995 Baltimore MD, 4 killed (bomb) (http://murderpedia.org/male.C/c/clark-mark-a.htm)
19 July 1995 Los Angeles CA, 4 killed (shot) (http://murderpedia.org/male.W/w/woods-willie.htm)
13 September 1995 Scott Mills OR, 4 killed (shot) (http://murderpedia.org/male.W/w/whitson-david.htm)
20 September 1995 Wilson County TX, 5 killed (multiple) (http://murderpedia.org/male.B/b1/bagwell-dennis.htm)
3 October 1995 Corpus Christie TX 6* killed (shot) (https://www.apnews.com/43e3a168e8024ac986b4794bea137e07)
8 December 1995 New York, NY, 8 killed (multiple) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
19 December 1995 Bronx NY 5 killed (shot) (http://murderpedia.org/male.V/v/vernon-michael.htm)
==1996==
2-3 February 1996 San Diego CA, 5 killed (Beating/stabbing) (http://murderpedia.org/male.J/j/jenkins-joshua.htm)
6 February 1996 Glendale CA 7 killed (arson) (http://murderpedia.org/male.A/a/avanesian-jorjik.htm)
9 February 1996 Fort Lauderdale FL 6* killed (shot) (http://murderpedia.org/male.M/m/mccree-clifton.htm)
3 March 1996 Albuquerque NM, 5 killed (shot) (http://murderpedia.org/male.H/h/harrison-shane-glen.htm)
16 July 1996 Winona MS 4 killed (shot) (https://en.wikipedia.org/wiki/Curtis_Flowers)
1 September 1996 Dinnehotso AZ 4 killed (shot) (http://murderpedia.org/male.Y/y/yazzie-norman.htm)
16 September 1999 Fort Worth TX 8* killed (shot) (https://www.caller.com/story/news/local/texas/state-bureau/2018/05/18/mass-shootings-texas-history/623798002/)
10 May 1996 Coos County OR, 5 killed (stabbed) (http://murderpedia.org/male.C/c/crum-girley.htm)
29 June 1996 Portland OR, 8 killed (arson) (http://murderpedia.org/male.D/d/deford-ray-martin.htm) Killer was 11 years old
3 July 1996 Lawrence County OH, 9 killed (bomb) (http://murderpedia.org/male.H/h/hall-todd.htm)
16 July 1996 Winona MS, 4 killed (shot) (http://murderpedia.org/male.F/f/flowers-curtis.htm)
1 September 1996 Dinnehotso AZ, 4 killed (shot) (http://murderpedia.org/male.Y/y/yazzie-norman.htm)
1 October 1996 Brazoria County TX 4 killed (shot) (http://murderpedia.org/male.M/m1/martinez-virgil.htm
27 October 1996 Anchorage AK, 4 killed (shot) (http://murderpedia.org/male.E/e/ely-paul.htm)
27 October 1996 San Marcos CA, 4 killed (shot) (http://murderpedia.org/female.E/e/eubanks-susan.htm)
==1997==
4 January 1997 Belleview WA, 4 killed (multiple) (http://murderpedia.org/male.A/a/anderson-david.htm)
27 March 1997 Shelby County AL, 4 killed (multiple) (http://murderpedia.org/male.D/d/duke-mark.htm) killer was 16 years old
16 June 1997 Seattle WA 4* killed (shot) (http://murderpedia.org/male.L/l/lau-samuel.htm)
13 August 1997 Detroit MI, 5 killed (stabbed) (http://murderpedia.org/male.J/j/jones-reco.htm)
15 August 1997, Aiken SC 4 killed (shot) (http://www.aikenstandard.com/news/twenty-years-later-remembering-the-shooting-at-phelon-plant-in/article_4b5b7132-9983-11e7-b425-9f5c8ce770f8.html)
19 August 1997 Colebrook NH, 4 killed (shot) (http://murderpedia.org/male.D/d/drega-carl.htm)
16 October 1997 New Orleans LA, 4 killed (multiple) (http://murderpedia.org/male.W/w/whitton-douglas.htm)
13 November 1997, Channelview TX, 5 killed (shot) (https://en.wikipedia.org/wiki/Coy_Wayne_Wesbrook)
30 November 1997 Bedford County TN, 4 killed (shot) (http://murderpedia.org/male.H/h1/holton-daryl.htm)
4 December 1997 Toombs County GA, 4 killed (shot) (http://murderpedia.org/male.H/h/heidler-jerry.htm)
5 December 1997 Yonkers NY, 5 killed (shot) (http://murderpedia.org/male.B/b/biller-patrick.htm)
6 December 1997 Weston FL, 4 killed (shot) (http://murderpedia.org/male.V/v/vitaver-daniel.htm)
15 December 1997 Aiken County SC, 4 killed (shot) (http://murderpedia.org/male.W/w1/wise-hastings.htm)
19 December 1997 Orange County CA 4 killed (shot) (http://murderpedia.org/male.R/r/reyes-torres-arturo.htm)
==1998==
9 January 1998 Tremont PA 4* killed (shot) (http://murderpedia.org/male.R/r/renninger-robert.htm)
11 February 1998 Noble IL, 5 killed (beaten (http://murderpedia.org/male.C/c/churchill-christopher.htm)
18 February 1988 Rochester MN, 4 killed (beaten) (http://murderpedia.org/male.B/b/brom-david-francis.htm)
6 March 1998, Newington CT, 5 killed (shot) (https://en.wikipedia.org/wiki/Connecticut_Lottery#1998_shootings)
24 March 1998 Craighead County AR, 5 killed (Shot) (https://en.wikipedia.org/wiki/List_of_school_shootings_in_the_United_States)
19 May 1998 Brooksville FL, 4 killed (shot) (http://murderpedia.org/male.C/c/carr-hank-earl.htm)
21 May 1998, Springfield CT, 4 killed (shot) (https://en.wikipedia.org/wiki/Thurston_High_School_shooting)
30 June 1998 Los Angeles CA, 4 killed (arson) (http://murderpedia.org/female.N/n/nieves-sandi.htm)
7 July 1998 Cameron County TX 4 killed (shot)( http://murderpedia.org/male.M/m/moore-ernest.htm
17 July 1998 Stockton CA, 6 killed (shot) (https://en.wikipedia.org/wiki/Cleveland_Elementary_School_shooting_(Stockton)
14 August 1998 Las Vegas NV 4 killed (http://murderpedia.org/male.Y/y/young-terrell.htm)
3? 6? September 1998 St Paul MN, 6 killed (strangled) (http://murderpedia.org/female.H/h/her-khoua.htm)
11 September 1998 Okaloosa County FL, 4 killed (shot) (http://murderpedia.org/male.H/h/hutchinson-jeffrey.htm)
19 September 1998 Escambia County FL, 4 killed (multiple) (http://murderpedia.org/male.C/c/coleman-michael.htm)
==1999==
12 January 1999 Anderson IN, 4 killed (shot) (http://murderpedia.org/male.J/j/jones-terry-m.htm)
19 January 1999 Greene County MO, 4 killed (strangled) (http://murderpedia.org/male.D/d/delong-richard-ivan.htm)
23 January 1999 Fresno County CA 4* killed (stabbed) (http://murderpedia.org/male.L/l/losev-vasily.htm)
26 January 1999 Forth Worth TX 4* (poison) (http://murderpedia.org/male.N/n/nunez-armando.htm)
12 February 1999 Tulsa OK, 6 killed (shot) (http://murderpedia.org/male.B/b/bell-edwin.htm)
10 March 1999 Ascension Parish LA 4 killed (shot) (http://murderpedia.org/male.M/m/miller-shon.htm
28 March 1999 Abilene TX, 4 killed (shot) (http://murderpedia.org/male.G/g/goodman-arthur-wayne.htm)
6 April 1999 Kill Devil Hills NC, 4 killed (vehicular homicide) (http://murderpedia.org/female.M/m/marvin-melissa.htm)
(Columbine massacre had two killers)
10 June 1999 East Hartford CT, 4 killed (multiple) (http://murderpedia.org/female.S/s/silk-kelly.htm)
12 June 1999 Atlanta GA 7* killed (shot) (http://murderpedia.org/male.M/m/marks-cyrano.htm)
14 June 1999 Brown County WI, 4 killed (multiple) (http://murderpedia.org/male.G/g/gilbert-michael.htm)
27 June 1999 Depoy KY, 4 killed (multiple) (http://murderpedia.org/male.W/w/wedding-terry.htm)
3 July 1999 Las Vegas NV, 4 killed (shot) (http://murderpedia.org/male.F/f/floyd-zane.htm)
8 July 1999 Sidney OH, 4 killed (shot) (http://murderpedia.org/male.H/h/hensley-lawrence.htm)
27/29 July 1999, Stockbridge/Atlanta GA, 13 killed (multiple) (https://en.wikipedia.org/wiki/Mark_O._Barton)
19 August 1999 Sacramento CA 5* killed (shot) (http://murderpedia.org/male.L/l/labatt-richard.htm)
28 August 1999 Los Angeles CA, 4 killed (shot) (http://murderpedia.org/male.V/v/von-paik-moo.htm)
15 September 1999, Fort Worth TX, 7* killed (shot) (https://en.wikipedia.org/wiki/Larry_Gene_Ashbrook)
2 November 1999, Honolulu HI, 7 killed (shot) (https://en.wikipedia.org/wiki/Xerox_murders)
4 December 1999 Sacramento CA, 6 killed (shot) (http://murderpedia.org/male.X/x/xiong-kao.htm)
15 December 1999 Fort Worth TX, 8 killed (shot) (https://en.wikipedia.org/wiki/List_of_rampage_killers_(Americas))
30 December 1999 Tampa FL, 5 killed (shot) (http://murderpedia.org/male.I/i/izquierdo-leyva.htm)
there doesn't seem to be anything here