The Honourable Thomas Francis Wenman FRS (18 November 1745 – 8 April 1796) was a British professor, natural historian, and antiquarian.
In 1765, while studying law, he was elected a fellow of All Souls College, Oxford, and in 1770, he was called to the bar.
Wenman unsuccessfully contested Wallingford in 1774, but was returned for Westbury, and sat in the House of Commons for the constituency until 1780.
In 1789, he was appointed Regius Professor of Civil Law in succession to Robert Vansittart, but his real interest lay in natural history and botany.
While collecting specimens, he fell into the River Cherwell, near Water Eaton, and was drowned on 8 April 1796.