Rosa Margaret Morris (16 July 1914 – 15 October 2011)[1] was a Welsh applied mathematician, working in potential theory and aerodynamics.

[8] Her approach showed "the advantages of using the complex variable in ... boundary problems of mathematical physics"[9] and made national news with human interest stories focusing on her as a "mathematical genius", having "found a method of solving problems in aerodynamics which have hitherto defied all mathematicians".

She was described as a "keen hockey player and accomplished dressmaker", and University College of South Wales and Monmouthshire Principal Frederick Rees stated that at her examination, she would have been entitled to 130 percent compared to the next best student, and a special case had to be made for her to avoid handicapping other students.

[12][13] Morris won scholarships worth £600 for the first year at Girton College, Cambridge,[4][10] where she was a M. T. Meyer research student.

"[24] In 1972–1973, while Morris was a Reader in Fluid Dynamics, she served as one of the first female heads of a mathematics department in the UK, possibly the first at a university.

[18] When she returned to Wales after completing her PhD studies in Cambridge, she lived in Rogerstone again, where she was a carer for her sister Olwen.

[5][2] Morris is listed in the Davis archive of about 2500 women who achieved honours degrees in Mathematics in Britain before 1940.