John Ellis (4 October 1874 – 20 September 1932) was a British executioner for 23 years, from 1901 to 1924. His other occupations were as a Rochdale hairdresser and newsagent.

At the age of 22 he applied to the Home Office to become an executioner and was invited to attend training at Newgate Prison. He first participated in an execution in Newcastle in December 1901, as assistant to William Billington. Ellis served as Chief Executioner from 1907 and was involved in a total of 203 executions. Among the executions he performed were those of Hawley Harvey Crippen (known as Dr. Crippen) in 1910, Frederick Seddon in 1912, Sir Roger Casement in 1916, Herbert Rowse Armstrong in 1922, and of Edith Thompson in 1923. He took the responsibility of his position very seriously and hoped to "despatch" the condemned person with as little fuss and pain to the individual concerned as possible.

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