Margaret Cross (22 December 1866 in Preston, United Kingdom – 14 March 1962 in Hemel Hempstead, Hertfordshire, UK) was a British educator and school principal, a pioneer of Co-education and of Steiner Waldorf education in Britain as well as of Biodynamic agriculture. Together with Hannah Clark she founded the Kings Langley Priory School, later the Rudolf Steiner School Kings Langley, which was closed in March 2019.