Thomas Garnier the Elder FLS (26 February 1776 – 29 June 1873) was an English clergyman and botanist.

[2][3] He was appointed Rector of Bishopstoke, Hampshire, in 1807, retaining this with the deanery.

[3] At Worcester College, Garnier's tutor was Stephen Long Jacob, who is said to have given him a taste for gardening.

In 1798, encouraged by Sir Joseph Banks, he joined the Linnean Society of London.

Dean Garnier's Garden in Winchester's cathedral close is named after him.