François-Xavier Tessier (September 15, 1799 – December 24, 1835) was a doctor, publisher, and political figure in Lower Canada.
At the recommendation of the medical board of examiners, he studied medicine at a university in New York and was qualified as a doctor in 1823.
Tessier lived in New York City from 1828 to 1830, where he contributed to a local newspaper.
He was fired from his posts at Quebec following the cholera epidemic of 1832; this may have been at least partly due to Tessier's politics.
He was elected to the Legislative Assembly of Lower Canada for Saguenay in an 1833 by-election held after the death of Joseph-Isidore Bédard; he was reelected in 1834.