Thomas Alexander Evelyn Platts-Mills, FRS (born 1941, Colchester), son of British member of parliament and barrister John Platts-Mills, is a British allergy researcher and director of the Division of Allergy and Clinical Immunology at the University of Virginia School of Medicine.

He then went to Balliol College, Oxford and St. Thomas' Hospital Medical School, received his PhD from London University, and completed a fellowship at Johns Hopkins University under the tutelage of Kimishige Ishizaka.

Since 1982 he has worked at the University of Virginia where he has been Professor of Medicine and Microbiology and, since 1993, head of the Division of Allergy and Clinical Immunology.

[5] Platts-Mills has researched the immune response to a range of allergens including those from pollens, dust mites, the fungus Trichophyton, and domestic cats.

[6] In 2010, his research earned Platts-Mills election as a Fellow of the Royal Society, the first allergist to be named to this select group.