Mary Royster (née Manning; 15 April 1870? – 28 December 1989) was an American supercentenarian claimant who is currently unverified. She claimed birth as Mary Manning in Mecklenburg, Virginia on 15 April 1870 as the daughter of Charles and Julia Royster Manning. She grew up in Mecklenburg and married Frank Winckler on 13 February 1895. The couple had four children before Frank died.
Mary then married John Royster on 15 June 1910 and had three children with him before he too died. Mary raised her children with the help of relatives and later moved to Rocky Mount, Nash, North Carolina. Mary herself claimed to have been born in 1870. Mary Royster died in Rocky Mount, North Carolina on 28 December 1989, reportedly aged 119 years, 257 days.