A list of events in 1940 related to serial killers.
January[]
- 1 — Clifford Olson is born.
February[]
- 2 — James Miller is born.
- 14 — Gary Lewingdon is born.
March[]
- 20 — Mike DeBardeleben is born.
- 25 — Douglas Wright is born.
April[]
May[]
June[]
- 2 — Robert Reldan is born.
- 7 — Samuel Little is born.
- 20 — Jack Reeves is born.
July[]
- 9 — William Johansen is apprehended.
August[]
- 9 — Sergey Kashintsev is born.
- 24 — Paul Bateson is born.
- 24 — Richard Biegenwald is born.
September[]
- 10 — Robert Anthony Buell is born.
- 27 — Lawrence Bittaker is born.
October[]
- 2 — Ernst-Dieter Beck died.
- 10 — Viktória Fődi died.
November[]
- 11 — Vladimir Vinnichevsky died.
December[]
- 18 — James Winkles is born.
Unknown[]
- ? — Edgar Antonsen is born.
- ? — John Edward Cavanaugh is apprehended.
- ? — Arthur Gatter is born.
- ? — Emma Heppermann is apprehended.
- ? — Joseph Norman Hill is born.
- ? — Smail Tulja is born.
- ? — Giorgio Vizzardelli is apprehended.
- ? — Barbara Wilkinson is born.