Captain Thomas Brown FRSE FLS (1785 – 8 October 1862) was a British naturalist and malacologist.
Brown was born in Perth, Scotland, and educated at the Royal High School, Edinburgh.
When he was twenty, he joined the Forfar and Kincardine Militia, rising to the rank of captain in 1811.
He was elected a Fellow of the Royal Society of Edinburgh in 1818, one of his proposers being James Jardine.
A species of sea snail, a marine gastropod, was named after him: Zebina browniana d'Orbigny, 1842.