Helen Hermione Munro Ferguson, Viscountess Novar GBE (14 March 1865 – 9 April 1941) was a Red Cross leader, as well as an advocate for nursing and healthcare and political activist.

She helped establish Red Cross branches, Voluntary Aid Detachments and the Territorial Force Nursing Service in Scotland.

When the First World War broke out, she helped to form a federated branch of the British Red Cross Society in Australia of which she was president, while the national executive and its central depot were established and run by the Australian government, run out of Government House, Melbourne, and encouraged the formation of divisions on the state level.

Many women formed local branches to help provide food and other essentials for Australian and European soldiers.

After the war ended, Munro Ferguson said Australian women should not disband their Red Cross branches.

She was also appointed to the international advisory committee of the League's nursing home at Manchester Square in London.

She has been seen as a prominent figure in a network of aristocratic women's imperial feminism and philanthropy that extended across the British Empire.