Dame Janet Mary Campbell, DBE, JP (5 March 1877 – 27 September 1954) was a British physician and medical officer.

[1] She helped in preparing the 1923 Hadow Report, Differentiation of the curriculum for boys and girls respectively in secondary schools.

In 1927, she gave a course of lectures at the King's College, London, on "Maternal Mortality", saying "We need more study and better investigation into the cause of this tragedy".

[15][16] In 1938, she chaired the Public Health Committee of the International Council of Women, presenting a report on malnutrition.

[1] Campbell married the civil servant Michael Heseltine, registrar of the General Medical Council, in 1934.