Gerontology Wiki
Mary Keir
Mary Keir
Keir receiving the COVID-19 vaccine at her care home on 17 December 2020 at age 108
Birth: 3 March 1912
St Davids, Pembrokeshire, Wales, UK
Age: 109 years, 318 days
Country: United Kingdom UK

Mary Letitia Keir (born 3 March 1912) is a British centenarian who was the oldest known person to receive the COVID-19 vaccine until various older people were vaccinated in later days. She is currently the oldest known person living in Wales.


Mary Keir was born in St Davids, Pembrokeshire, Wales 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, Kier moved into a care home in Llandeilo, Carmarthenshire, Wales. Coincidentally, 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 on 9 September 2021, following the death of 110-year-old Amy Hawkins.