Mary Keir

	Mary Keir
	;
Birth:	3 March 1912; St Davids, Pembrokeshire, Wales, UK
Age:	112 years, 216 days
Country:	UK
	Validated

Mary Letitia Keir (born 3 March 1912) is a British supercentenarian who is currently the oldest known person living in Wales. She was also the oldest known person to receive the COVID-19 vaccine until various older people were vaccinated in later days. Her age is validated by the Gerontology Research Group (GRG).

Biography[]

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.

In either 2011 or 2012, Keir moved into a care home in Llandeilo, Carmarthenshire, Wales. Coincidentally, another supercentenarian Gwenllian Davies (1905–2016) was also a resident of the same home. On 17 December 2020 at 2.30pm, Keir received her first dose of the Pfizer/BionTech vaccine, making her one of the first care home residents in Wales to be vaccinated against COVID-19.

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.

In March 2022, Keir celebrated her 110th birthday.

Keir's age was verified by GRG-UK Correspondent Oliver Trim, and validated by the GRG on 18 June 2023. She is currently the second-oldest known living person in the United Kingdom, behind Ethel Caterham.