Herbert Lumley Snow (1847 – 20 November 1930) was an English surgeon, anti-vivisectionist, cancer researcher and medical writer.

He found that "of 250 women suffering from cancer of the mammae and uterus... 171 had expressed history of an immediate antecedent of trouble often in very poignant form, as the loss of a near relative.

"[5] In 1896, Snow developed the Brompton cocktail made from a combination of morphine and cocaine to relieve pain in cancer patients.

[2] Snow was a germ theory denialist, anti-vaccinationist and opponent of circumcision and vivisection.

[2] Snow was chairman of the British Section of the International Medical Anti-Vivisection Association.