Marion Phillips (29 October 1881 – 23 January 1932) was an Australian-born British Labour Party politician who served as a Member of Parliament (MP) from 1929 to 1931.

Marion Phillips was born on 29 October 1881 in St Kilda, a suburb of Melbourne, Victoria, in colonial Australia.

In 1904, she began a research scholarship at the London School of Economics, graduating as a Doctor of Science in 1907, with a thesis about the development of New South Wales.

Unlike prominent suffragettes, her vision was not concentrated upon extending the franchise, she wanted state interventions in the free market to be better informed by considerations of life outside the workplace.

In this endeavour she provoked about a quarter of a million housewives to take part in the labour movement and helped popularise issues such as equality for women in the workplace, school meals, clinics and playspaces for children, the fundamental value of mothering, a more humanitarian, safety-conscious, approach to the design of homes for ordinary families, and an eradication of needless drudgery and squalour from home life.

Together with Margaret Bondfield, Phillips "worked tirelessly within the WLL to raise the political consciousness of women and encourage their participation."