Margaret Maria Verney (née Hay-Williams or Williams-Hay) (3 December 1844 – 7 October 1930), was an English-born Welsh educationist.
Margaret Maria Hay Williams was born on 3 December 1844, the daughter of Lady Sarah Elizabeth Amherst and her husband John Hay-Williams, 2nd Baronet Williams of Bodelwyddan. She had a sister, Maude. Her childhood was spent in North Wales and London and she recorded the years 1854 - 1857 in diaries. On the death of her father in 1859, she inherited his house "Rhianfa", on Anglesey, which she retained as a family home.
In 1868 she married Sir Edmund Hope Verney, MP, then known as Captain Verney.
She became a leading campaigner for girls' education in the UK. In 1894 she became a member of the Statutory Council of the University of Wales, holding the position until 1922. In 1904 she produced an edition of the Memoirs of the Verney Family during the Seventeenth Century. She also contributed to the Dictionary of National Biography.