|Birth:||3 June 1832|
Clayton, England, UK
|Death:||2 October 1940|
Brighton, England, UK
|Age:||108 years, 121 days|
Mary Davey (3 June 1832 – 2 Oct 1940) was a British centenarian who was the oldest known living person in the United Kingdom at the time of her death.
Mary Davey was born in Clayton, Sussex, United Kingdom, on 3 June 1832 and was baptised there on 12 May 1833. She never married, and worked as a baker's assistant for over 70 years until after her 90th birthday. On 14 November 1935, at the age of 103, Davey voted in the 1935 UK General Election.
Davey became the oldest known person in the United Kingdom on 12 October 1938, following the death of 108-year-old Rachel Swain of Flitwick, Bedfordshire. She held the title until her own death on 2 October 1940, aged 108 years, 121 days. She was succeeded as the oldest person in the United Kingdom by Thomas Pope.
- Oldest in Britain
-  Information about birth and baptism
-  Obituary, The West Australian, 5 October 1940
-  Article about the 1935 UK General Election mentioning Mary Davey, The Broken Hill Barrier Miner, 15 November 1935