Margaret Wintringham JP (née Longbottom; 4 August 1879 – 10 March 1955) was a British Liberal Party politician.

They had no children, and Margaret Wintringham became a magistrate and a member of the Grimsby Education Committee.

[4] In March 1976 Wintringham's niece, Mrs Elizabeth Neale, spoke about her aunt's personality and role in the WI, as well as her time as Director of the Women's Land Army in Lincolnshire, and her friendship with Gwendolen Maclean, mother of Soviet double agent, Donald Maclean.

Wintringham's gardener and chauffeur, Leslie Smith, was also interviewed in May 1976, focusing particularly on her support of local education and her work with the WI.

She also campaigned for equal pay for women, for state scholarships for girls as well as boys, and women-only railway carriages.