Thomas Allis FLS (9 January 1788 – 24 September 1875) was a British osteologist and museum curator.

[1][2] Allis was educated at Burford and married Mary Naish of Flax Burton in 1812, before going to York in 1823.

Allis held two Honorary Curatorships at the Yorkshire Museum from 1835 to 1875, was elected as a Fellow of the Linnean Society in 1857 and was one of the first members of the British Association.

[1][2] He was Honorary Curator of Ornithology from 1835 to 1839 before succeeding James Atkinson, following his death in 1839, in the post of Honorary Curator of Comparative Anatomy - a position Allis held from 1839 until his death in 1875.

[4] A collection of comparative anatomy was purchased from Allis by the Yorkshire Philosophical Society in 1838 for £350.