Thomas Hornsey Bell FRS FLS (11 October 1792 – 13 March 1880) was an English zoologist, dental surgeon and writer, born in Poole, Dorset, England.

He combined two careers, becoming Professor of Zoology at King's College London in 1836 (on the strength of amateur research) and lecturing on anatomy at Guy's Hospital.

Bell appears to have been unimpressed, and in his annual presidential report presented in May 1859 wrote that "The year which has passed has not, indeed, been marked by any of those striking discoveries which at once revolutionize, so to speak, the department of science on which they bear".

[6][7] In his seventieth year Bell retired to The Wakes, a house at Selborne, where he took a keen interest in its former resident, the amateur naturalist Gilbert White.

[8] Bell married Jane Sarah, daughter of William Roberts, Esq., at St Mary's Church, Rotherhithe on 3 December 1832.