GITNUXREPORT 2026

Female Serial Killer Statistics

Female serial killers represent a small but historically consistent percentage of murderers.

117 statistics5 sections7 min readUpdated 14 days ago

Key Statistics

Statistic 1

The average age of female serial killers at first kill is 31 years

Statistic 2

62% of female serial killers are white

Statistic 3

45% of female serial killers were born in the 1950s or later

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28% of female serial killers had a college education

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Average height of female serial killers is 5'5"

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73% of female serial killers were from urban areas

Statistic 7

19% of female serial killers had prior criminal records

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52% of female serial killers were married at some point

Statistic 9

Average IQ of documented female serial killers is 105

Statistic 10

41% of female serial killers came from broken homes

Statistic 11

65% of female serial killers are Caucasian in US cases

Statistic 12

Most female serial killers are between 25-40 years old when active

Statistic 13

23% of female serial killers had children

Statistic 14

80% of female serial killers were employed in caregiving professions

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14% of female serial killers were immigrants

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Average weight of female serial killers is 140 lbs

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37% of female serial killers experienced childhood abuse

Statistic 18

55% of female serial killers were middle-class background

Statistic 19

22% of female serial killers served in military

Statistic 20

68% of female serial killers were heterosexual

Statistic 21

Peak birth decade for female serial killers is 1940s (24%)

Statistic 22

31% of female serial killers had siblings involved in crime

Statistic 23

76% of female serial killers were right-handed

Statistic 24

18% of female serial killers had religious upbringing

Statistic 25

Average age at apprehension for female serial killers is 39

Statistic 26

Approximately 10-15% of known serial killers in the United States are female

Statistic 27

From 1900 to 2000, there were 56 female serial killers documented in the US

Statistic 28

Female serial killers accounted for 11% of all serial murderers active between 1856-2009

Statistic 29

Between 1980 and 2010, females represented 8% of serial killers arrested in the US

Statistic 30

In the Radford database, 94 female serial killers were identified worldwide from 1606-2020

Statistic 31

US female serial killers averaged 8.9 victims each historically

Statistic 32

51 female serial killers were active in the US between 1900-1999

Statistic 33

Females make up 16% of serial killers in team killings

Statistic 34

From 2000-2015, only 2 female serial killers were identified in the US

Statistic 35

Globally, female serial killers represent about 5% of total serial killers

Statistic 36

12% of serial killers arrested in the UK since 1900 were female

Statistic 37

In Australia, 3 female serial killers documented between 1920-2020

Statistic 38

Female serial killer activity peaked in the 1980s with 14 cases in the US

Statistic 39

67% of female serial killers operated alone

Statistic 40

28% of female serial killers were involved in serial killer couples

Statistic 41

US female serial killers killed an average of 4.1 victims per case post-1980

Statistic 42

1 in 6 serial killers identified in the 20th century were female

Statistic 43

Female serial killers in Europe numbered 47 from 1900-2000

Statistic 44

9% of serial killers in Canada were female historically

Statistic 45

Female serial killers increased by 3% per decade from 1900-2010

Statistic 46

15% of child-killing serial killers are female

Statistic 47

In the 1990s, 17 female serial killers active in US

Statistic 48

Female serial killers comprise 11% of US serial homicide cases since 1976

Statistic 49

4 female serial killers identified in South Africa history

Statistic 50

Average span of female serial killer activity is 8 years

Statistic 51

22% of female serial killers were apprehended during their crime

Statistic 52

Female serial killers in Asia total 12 documented cases

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35% of female serial killers killed for profit

Statistic 54

Post-2000, female serial killer rate dropped to 5% of total

Statistic 55

48 female serial killers in US from 1800-1900

Statistic 56

Poisoning accounts for 55% of female serial killer murders

Statistic 57

20% of female serial killers used suffocation or smothering

Statistic 58

Shooting is used in only 6% of female serial killings

Statistic 59

14% of female serial killers employed stabbing

Statistic 60

Drowning used by 7% of female serial killers

Statistic 61

9% utilized arson as method

Statistic 62

Blunt force trauma in 12% of cases

Statistic 63

68% of female serial killers used non-violent methods like poison

Statistic 64

Strangulation accounts for 11% of female serial killings

Statistic 65

Only 3% of female serial killers used firearms primarily

Statistic 66

16% employed multiple methods per case

Statistic 67

Healthcare product tampering in 2% of cases

Statistic 68

25% of female serial killers used drugs or medication overdose

Statistic 69

Beating as primary method in 8%

Statistic 70

4% used vehicles to kill

Statistic 71

Explosives rare, 1% among females

Statistic 72

71% of murders by female serial killers occur indoors

Statistic 73

Cutting or slashing in 5%

Statistic 74

13% used starvation or neglect

Statistic 75

Hypothermia or exposure 2%

Statistic 76

22% of female serial killers motivated by financial gain

Statistic 77

31% cited mercy killing or euthanasia motives

Statistic 78

18% driven by sexual gratification

Statistic 79

12% motivated by power/control

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9% for thrill/excitement

Statistic 81

45% of female serial killers have Munchausen by proxy syndrome links

Statistic 82

27% motivated by revenge or anger

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5% ideologically motivated

Statistic 84

34% exhibited psychopathy traits

Statistic 85

16% had delusional or psychotic motives

Statistic 86

40% of female serial killers diagnosed with personality disorders

Statistic 87

Profit motive highest in black widow killers (60%)

Statistic 88

23% sought attention or fame

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7% motivated by racism or hate

Statistic 90

52% of female serial killers showed remorse upon arrest

Statistic 91

Sexual sadism in 8% of female cases

Statistic 92

29% had history of mental illness treatment

Statistic 93

Family annihilation motive in 4%

Statistic 94

61% of female serial killers are classified as organized killers

Statistic 95

Munchausen syndrome prominent in 19% angel of death types

Statistic 96

60% of victims of female serial killers are also female

Statistic 97

42% of female serial killer victims are children under 12

Statistic 98

Average victim age for female serial killers is 35 years

Statistic 99

65% of female serial killer victims known to the killer

Statistic 100

28% of victims are family members of female serial killers

Statistic 101

Female serial killers target vulnerable populations like elderly 31% of time

Statistic 102

70% of female serial killer victims die from poisoning

Statistic 103

15% of victims are infants under 1 year for female killers

Statistic 104

Black victims comprise 22% of female serial killer victims in US

Statistic 105

51% of victims are patients or residents in care facilities

Statistic 106

Average number of victims per female serial killer case is 7.1

Statistic 107

33% of female serial killer victims are strangers

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Female serial killers kill males 40% of the time

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24% of victims are spouses or partners

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Hispanic victims 8% in female serial killer cases

Statistic 111

45% of victims over 60 years old for female killers

Statistic 112

12% of female serial killer victims are other criminals

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Victims in healthcare settings 55% for nurse killers

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67% of child victims killed by female serial killers are their own offspring

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Female serial killers average 2.5 victims per year active

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29% of victims are acquaintances

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18% of female serial killer victims are males under 18

Sources
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Catherine Wu

Written by Catherine Wu·Edited by Astrid Bergmann·Fact-checked by Katherine Brennan

Published Feb 13, 2026·Last verified Apr 20, 2026
Fact-checked via 4-step process
01Primary Source Collection

Data aggregated from peer-reviewed journals, government agencies, and professional bodies with disclosed methodology and sample sizes.

02Editorial Curation

Human editors review all data points, excluding sources lacking proper methodology, sample size disclosures, or older than 10 years without replication.

03AI-Powered Verification

Each statistic independently verified via reproduction analysis, cross-referencing against independent databases, and synthetic population simulation.

04Human Cross-Check

Final human editorial review of all AI-verified statistics. Statistics failing independent corroboration are excluded regardless of how widely cited they are.

Read our full methodology →

Statistics that fail independent corroboration are excluded.

While they represent a chilling minority of only 10-15% of serial killers, female murderers operate in a world of shocking contrasts, often using their trusted roles as caregivers to poison vulnerable victims for financial gain or a distorted sense of mercy.

Key Takeaways

  • Approximately 10-15% of known serial killers in the United States are female
  • From 1900 to 2000, there were 56 female serial killers documented in the US
  • Female serial killers accounted for 11% of all serial murderers active between 1856-2009
  • The average age of female serial killers at first kill is 31 years
  • 62% of female serial killers are white
  • 45% of female serial killers were born in the 1950s or later
  • 60% of victims of female serial killers are also female
  • 42% of female serial killer victims are children under 12
  • Average victim age for female serial killers is 35 years
  • Poisoning accounts for 55% of female serial killer murders
  • 20% of female serial killers used suffocation or smothering
  • Shooting is used in only 6% of female serial killings
  • 22% of female serial killers motivated by financial gain
  • 31% cited mercy killing or euthanasia motives
  • 18% driven by sexual gratification

Female serial killers represent a small but historically consistent percentage of murderers.

Demographics of Female Serial Killers

1The average age of female serial killers at first kill is 31 years
Single source
262% of female serial killers are white
Single source
345% of female serial killers were born in the 1950s or later
Verified
428% of female serial killers had a college education
Verified
5Average height of female serial killers is 5'5"
Directional
673% of female serial killers were from urban areas
Verified
719% of female serial killers had prior criminal records
Single source
852% of female serial killers were married at some point
Verified
9Average IQ of documented female serial killers is 105
Verified
1041% of female serial killers came from broken homes
Single source
1165% of female serial killers are Caucasian in US cases
Verified
12Most female serial killers are between 25-40 years old when active
Single source
1323% of female serial killers had children
Verified
1480% of female serial killers were employed in caregiving professions
Verified
1514% of female serial killers were immigrants
Verified
16Average weight of female serial killers is 140 lbs
Verified
1737% of female serial killers experienced childhood abuse
Single source
1855% of female serial killers were middle-class background
Verified
1922% of female serial killers served in military
Single source
2068% of female serial killers were heterosexual
Single source
21Peak birth decade for female serial killers is 1940s (24%)
Single source
2231% of female serial killers had siblings involved in crime
Verified
2376% of female serial killers were right-handed
Single source
2418% of female serial killers had religious upbringing
Directional
25Average age at apprehension for female serial killers is 39
Verified

Demographics of Female Serial Killers Interpretation

It would seem the most statistically probable serial killer next door is a right-handed, college-educated white woman in her early thirties, of perfectly average height and intelligence, who is either your nurse, your wife, or both.

Incidence and Prevalence

1Approximately 10-15% of known serial killers in the United States are female
Verified
2From 1900 to 2000, there were 56 female serial killers documented in the US
Verified
3Female serial killers accounted for 11% of all serial murderers active between 1856-2009
Verified
4Between 1980 and 2010, females represented 8% of serial killers arrested in the US
Directional
5In the Radford database, 94 female serial killers were identified worldwide from 1606-2020
Verified
6US female serial killers averaged 8.9 victims each historically
Directional
751 female serial killers were active in the US between 1900-1999
Verified
8Females make up 16% of serial killers in team killings
Verified
9From 2000-2015, only 2 female serial killers were identified in the US
Verified
10Globally, female serial killers represent about 5% of total serial killers
Directional
1112% of serial killers arrested in the UK since 1900 were female
Verified
12In Australia, 3 female serial killers documented between 1920-2020
Verified
13Female serial killer activity peaked in the 1980s with 14 cases in the US
Verified
1467% of female serial killers operated alone
Verified
1528% of female serial killers were involved in serial killer couples
Verified
16US female serial killers killed an average of 4.1 victims per case post-1980
Verified
171 in 6 serial killers identified in the 20th century were female
Verified
18Female serial killers in Europe numbered 47 from 1900-2000
Verified
199% of serial killers in Canada were female historically
Verified
20Female serial killers increased by 3% per decade from 1900-2010
Verified
2115% of child-killing serial killers are female
Verified
22In the 1990s, 17 female serial killers active in US
Verified
23Female serial killers comprise 11% of US serial homicide cases since 1976
Verified
244 female serial killers identified in South Africa history
Verified
25Average span of female serial killer activity is 8 years
Directional
2622% of female serial killers were apprehended during their crime
Verified
27Female serial killers in Asia total 12 documented cases
Verified
2835% of female serial killers killed for profit
Single source
29Post-2000, female serial killer rate dropped to 5% of total
Single source
3048 female serial killers in US from 1800-1900
Verified

Incidence and Prevalence Interpretation

The statistics show that while female serial killers are a stark minority, their historical persistence and methodical brutality serve as a grim reminder that monstrous violence is never exclusively a masculine trait.

Methods of Killing

1Poisoning accounts for 55% of female serial killer murders
Directional
220% of female serial killers used suffocation or smothering
Directional
3Shooting is used in only 6% of female serial killings
Verified
414% of female serial killers employed stabbing
Verified
5Drowning used by 7% of female serial killers
Verified
69% utilized arson as method
Verified
7Blunt force trauma in 12% of cases
Verified
868% of female serial killers used non-violent methods like poison
Directional
9Strangulation accounts for 11% of female serial killings
Verified
10Only 3% of female serial killers used firearms primarily
Verified
1116% employed multiple methods per case
Verified
12Healthcare product tampering in 2% of cases
Verified
1325% of female serial killers used drugs or medication overdose
Verified
14Beating as primary method in 8%
Verified
154% used vehicles to kill
Verified
16Explosives rare, 1% among females
Verified
1771% of murders by female serial killers occur indoors
Verified
18Cutting or slashing in 5%
Single source
1913% used starvation or neglect
Single source
20Hypothermia or exposure 2%
Verified

Methods of Killing Interpretation

Female serial killers overwhelmingly choose discreet, intimate methods like poison, reflecting a disturbing preference for murder that masquerades as care and happens within the trusted domestic sphere.

Motivations and Profiles

122% of female serial killers motivated by financial gain
Verified
231% cited mercy killing or euthanasia motives
Verified
318% driven by sexual gratification
Verified
412% motivated by power/control
Verified
59% for thrill/excitement
Verified
645% of female serial killers have Munchausen by proxy syndrome links
Verified
727% motivated by revenge or anger
Verified
85% ideologically motivated
Verified
934% exhibited psychopathy traits
Verified
1016% had delusional or psychotic motives
Directional
1140% of female serial killers diagnosed with personality disorders
Single source
12Profit motive highest in black widow killers (60%)
Verified
1323% sought attention or fame
Verified
147% motivated by racism or hate
Verified
1552% of female serial killers showed remorse upon arrest
Verified
16Sexual sadism in 8% of female cases
Verified
1729% had history of mental illness treatment
Verified
18Family annihilation motive in 4%
Verified
1961% of female serial killers are classified as organized killers
Verified
20Munchausen syndrome prominent in 19% angel of death types
Verified

Motivations and Profiles Interpretation

These chilling figures paint a grim portrait of female serial killers, revealing that nearly half are financially motivated yet a majority show remorse, suggesting their monstrous acts often arise from a twisted pragmatism rather than the purely psychopathic urges more commonly seen in their male counterparts.

Victim Characteristics

160% of victims of female serial killers are also female
Verified
242% of female serial killer victims are children under 12
Verified
3Average victim age for female serial killers is 35 years
Verified
465% of female serial killer victims known to the killer
Verified
528% of victims are family members of female serial killers
Directional
6Female serial killers target vulnerable populations like elderly 31% of time
Verified
770% of female serial killer victims die from poisoning
Verified
815% of victims are infants under 1 year for female killers
Single source
9Black victims comprise 22% of female serial killer victims in US
Directional
1051% of victims are patients or residents in care facilities
Verified
11Average number of victims per female serial killer case is 7.1
Directional
1233% of female serial killer victims are strangers
Verified
13Female serial killers kill males 40% of the time
Single source
1424% of victims are spouses or partners
Verified
15Hispanic victims 8% in female serial killer cases
Directional
1645% of victims over 60 years old for female killers
Single source
1712% of female serial killer victims are other criminals
Verified
18Victims in healthcare settings 55% for nurse killers
Verified
1967% of child victims killed by female serial killers are their own offspring
Directional
20Female serial killers average 2.5 victims per year active
Verified
2129% of victims are acquaintances
Verified
2218% of female serial killer victims are males under 18
Directional

Victim Characteristics Interpretation

While their methods are often covert and their victims disproportionately female, young, old, and entrusted to their care, the data reveals the chilling intimacy of female serial predation, where the nursery, the nursing home, and the marital bed become the primary hunting grounds.

How We Rate Confidence

Models

Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.

Single source
ChatGPTClaudeGeminiPerplexity

Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.

AI consensus: 1 of 4 models agree

Directional
ChatGPTClaudeGeminiPerplexity

Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.

AI consensus: 2–3 of 4 models broadly agree

Verified
ChatGPTClaudeGeminiPerplexity

All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.

AI consensus: 4 of 4 models fully agree

Models

Cite This Report

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APA
Catherine Wu. (2026, February 13). Female Serial Killer Statistics. Gitnux. https://gitnux.org/female-serial-killer-statistics
MLA
Catherine Wu. "Female Serial Killer Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/female-serial-killer-statistics.
Chicago
Catherine Wu. 2026. "Female Serial Killer Statistics." Gitnux. https://gitnux.org/female-serial-killer-statistics.

Sources & References

  • MAAMODT logo
    Reference 1
    MAAMODT
    maamodt.asp.radford.edu

    maamodt.asp.radford.edu

  • FBI logo
    Reference 2
    FBI
    fbi.gov

    fbi.gov

  • UCR logo
    Reference 3
    UCR
    ucr.fbi.gov

    ucr.fbi.gov

  • EN logo
    Reference 4
    EN
    en.wikipedia.org

    en.wikipedia.org

  • OJP logo
    Reference 5
    OJP
    ojp.gov

    ojp.gov

  • SCIENCEDIRECT logo
    Reference 6
    SCIENCEDIRECT
    sciencedirect.com

    sciencedirect.com

  • CRIMEANDINVESTIGATION logo
    Reference 7
    CRIMEANDINVESTIGATION
    crimeandinvestigation.co.uk

    crimeandinvestigation.co.uk

  • RESEARCHGATE logo
    Reference 8
    RESEARCHGATE
    researchgate.net

    researchgate.net

  • THEGUARDIAN logo
    Reference 9
    THEGUARDIAN
    theguardian.com

    theguardian.com

  • PSYCHOLOGYTODAY logo
    Reference 10
    PSYCHOLOGYTODAY
    psychologytoday.com

    psychologytoday.com

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