Sir Thomas Gage, 7th Baronet (1781 – 27 December 1820, Rome) was an English botanist, from a junior branch of the Gage family of Firle, Sussex. The woodland flower Gagea is named in his honour.
He married, Mary-Anne Browne, the daughter of Valentine Browne, 1st Earl of Kenmare
In his herbarium, he had various plant specimens including Iris subbiflora.