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Mary Keir

Validated By: On Date: Apr. 27th 2022

Mary Letitia Keir is a British supercentenarian who is currently the oldest known person living in Wales. Her age has been validated by the European Supercentenarian Organisation (ESO).


Mary Keir was born in St Davids, Pembrokeshire, Wales, UK on 3 March 1912. She later lived in Llansteffan, Carmarthenshire, Wales. She worked as a ward sister at Llandough Hospital in Penarth, Wales for 12 years. [source] She had one son.

In either 2011 or 2012, Kier moved into a care home in Llandeilo, Carmarthenshire, Wales. Coincidentally, another supercentenarian Gwenllian Davies (1905–2016) was also a resident of the same home. [source]

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Keir became the oldest known living person in Wales, following the death of 110-year-old Amy Hawkins on 9 September 2021, as well as the oldest known living person born in Wales, following the death of Mollie Walker on 22 January 2022.

Her age was verified by Andrew Holmes, and validated by the ESO on 27 April 2022.