Mary Keir

United Kingdom data
  • Full name: Mary Letitia Keir
  • Lifespan: 03.03.1912
  • Age: 111 years
  • Birthplace: St Davids, Pembrokeshire, Wales, UK
  • Last residence: Llandeilo, Carmarthenshire, Wales, UK
  • Application date: 08.02.2023
  • Validation date: 18.06.2023
  • Validation source: Oliver Trim


Born on March 3, 1912 in St Davids, Pembrokeshire, Wales, UK, Mary Keir’s life has been a tapestry of resilience, care, and historic milestones. She later lived in Llansteffan, Carmarthenshire, Wales.

Her professional journey led her to become a ward sister at Llandough Hospital in Penarth, Wales – a testament to her dedication to the well-being of others.

In 2011 or 2012, Mary transitioned to a care home in Llandeilo, Carmarthenshire, where she found camaraderie with another supercentenarian, Gwenllian Davies. In a heartening turn of events, on 17 December 2020, Mary Keir became one of the first care home residents in Wales to receive the Pfizer/BioNTech vaccine against COVID-19.

Mary Keir’s journey has been marked by milestones and recognition within the supercentenarian community.

Celebrating her 110th birthday in March 2022, Mary Keir stands today as the fourth-oldest known living person in the United Kingdom, a living testament to the strength and grace that a life well-lived can bring.

Longevity Recognition

As life unfolded, Mary Keir emerged as the oldest known living person in Wales, claiming the title after the passing of Amy Hawkins on September 9, 2021. Additionally, she became the oldest known living person born in Wales, succeeding Mollie Walker on January 22, 2022.

As of her 111th birthday, Mary Keir was the fifth-oldest known living person in the United Kingdom, behind Ethel Caterham, Ada ThompsonEdna Strickland, and Mary Florence Walker.

Longevity Recognition

  • Oldest living person in Wales (09.09.2021 – present)


Mary Keir’s age was meticulously examined and verified by Oliver Trim, GRG Correspondent for the United Kingdom, and validated by the Gerontology Research Group (GRG) as of June 18, 2023.

Mary Keir

Mary Keir on her 100th birthday.

Mary Keir, 105th birthday

Mary Keir receiving the COVID-19 vaccine at her care home on 17 December 2020 at the age of 108/
Mary Keir on her 110th birthday.
Mary Keir, 111th birthday

Photo courtesy of BBC News, and Gerontology Wiki.

Translate »