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Margaret Winifred Vowles (née Pearce; 4 January 1882, Gloucester – 4 March 1932, Kingston ^[1]) was an English author on science.

She was the daughter of Francis Tring Pearce (16 Mar 1846 – 19 May 1935) and Martha Allen of Lorraine House, Gloucester, England. FT Pearce was a director of Priday, Metford and Company Limited millers of Gloucester. ^{[ citation needed]} Her maternal grandfather was Henry Allen who was Mayor of Gloucester in 1873.

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She took a Bachelor of Science Degree from the University of London for which she studied at Cheltenham Ladies' College. She became a member of the History of Science Society and the Women's Engineering Society. Prior to her death she had been living in Wimbledon for two years and was a member of the local branch of the Women Citizen's Association. She published one book and a number of articles on science with her husband Hugh Pembroke Vowles.

• 
  Christopher Vowles, Margaret W Vowles née Pearce and Francis Hugh Vowles c1916

• The Quest for Power (Chapman and Hall, London, 1931 book published with Hugh Pembroke Vowles)
• Science and Industrial Insanity. Article published with Hugh Vowles. Date uncertain.