Jack the Ripper is generally considered to have been active in the late summer and autumn of 1888 in London, with most historians focusing on the period from August to November 1888.

Core timeline

  • The soā€‘called ā€œcanonical fiveā€ murders linked most firmly to Jack the Ripper all occurred between August and November 1888 in the Whitechapel area of London.
  • Some researchers also connect additional Whitechapel murders from 1888 to 1891 with the same killer, giving a broader activity window of roughly 1888ā€“1891, though those extra attributions are disputed.

Narrow vs wider dates

  • The narrow, most widely accepted answer to ā€œwhen was Jack the Ripper activeā€ is late 1888, especially Augustā€“November of that year.
  • A wider, more speculative view treats the entire series of Whitechapel murders between April 1888 and February 1891 as the Ripper era, even though not all specialists agree they were committed by the same person.

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