| Multiple Poisonings |
| Name | Kills | Survivers | Victims |
| Margie Velma Barfield | 4 (7) | 1 | husband, mother, fiancee | |
| Martha Beck | 12 (20) | 1 | | lonely women | |
| Marie Alexandrine Becker | 12 | | husband, lover, friends | |
| Marie Besnard | 13 | | two husbands, parents, in-laws, cousins, neighbors | |
| Elfriede Blauensteiner | 5+ | 1+ | husbands, lovers, neighbors | |
| Cordelia Botkin | 2 | |
| Judias Buenoano | 3 | 1 | two husbands and a son | |
| Sarah Clark | 2 | 2 | family of rival | |
| Mary Ann Cotton | (17+) | | husbands, children, stepchildren, mother, sister-in-law | |
| Mary Frances Creighton | 3 | | brother, father-in-law, lover | |
| Marybeth Davis | 1 | 1 | son, daughter | |
| Daisy Louisa C. De Melker | 3 | | two husbands and a son | |
| Nannie Hazel Doss | 10 | | children, husbands, sisters, mother | |
| Ellen Etheridge | 4 | | stepchildren | |
| Catherine Flanagan | ?? | ?? | brother in law, poss. others | arsenic |
| Mrs. Julius Fuzekos | 7 (100) | 1 | husbands (other women's) | |
| Tillie Gbrurek | 5 | 1 | four husbands, one neighbor | |
| Janie Lou Gibbs | 5 | | husband, four children | |
| Amy Gilligan | 9 | | 5 husbands, 4 patients | |
| Debora Green | 2 | 1 | children, husband | |
| Caroline Grills | 4 | 2 | family members, friend | |
| Martha Grinder | 2 | | two women, different sirnames | |
| Belle Gunness | 16 (49) | | husbands, children, employees, suitors | |
| Anna Marie Hahn | 5 (7) | 2 | elderly men | |
| Masumi Hayashi | 4 | 63 | random strangers | arsenic |
| Ellen Heesom | 3 | | two of her own children, mother | arsenic |
| Margaret Higgins | ?? | ?? | husband, poss. others | arsenic |
| Audrey Marie Hilley | 3 (4) | 4 | husband, daughter, mom-in-law, neighbor child | |
| Helene Jegado | 23+ | 9 | sister, aunt, employers, fellow nuns, fellow servants | |
| Christa Lehman | 4 | | husband, father-in-law, and at least two neighbors | |
| Juliane Lipka | 7 (100) | 1 | husbands (other women's) | |
| Anjette Lyles | 4 | | 2 husbands, mother-in-law, daughter | |
| Rhonda Bell Martin | 6 (8) | 1 | mother, 2 husbands, 3 (5) children | |
| Blanche Taylor Moore | 5 | 1 | 2 husbands, father, mother-in-law, lover | |
| Stella Nickell | 2 | ? | husband, stranger |
| Susi Olah | 7 (100) | 1 | husbands (other women's) | |
| Madame Popova | (300) | | husbands (other women's) | |
| Dorothea Puente | 9 (25) | | tenants | |
| Christina Riggs | 2 | | children | |
| Amelia Sach | ? | ? | infants, adoption | |
| Antoinette Scieri | 12 (?) | | elderly patients | |
| Lydia Sherman | 11(+) | ? | 3 husbands, 5 children, 2 stepchildren | |
| Mrs. Szabo | 7 (100) | 1 | husbands (other women's) | |
| Lydia Trueblood | 6 | 1 | four husbands, son, brother-in-law | |
| Eliz. Van Valkenburgh | 2 | | husbands | |
| Maria Velten | 5 | | two husbands, father, aunt, lover | |
| Louise Vermilyea | 10 | | 2 husbands, 3 children (hers), stepson, friends | |
| Annie Walters | ? | ? | infants, adoption | |
| Dorothea Waddingham | 2 | | patients | |
| Lorraine Alice Whyte | 1 | several | husband and his coworkers | arsenic |
| Martha Hasel Wise | 3 | (?) | mother, aunt, uncle | |
| Anna Zwanziger | 3+ | ? | rivals, employers, and their families | arsenic |