Thomas A. Barnes was a state legislator in Mississippi. He served as Speaker of the Mississippi House of Representatives during the first General Assembly held in Mississippi in 1817. Barnes had previously been a member of the Legislative Council of the Mississippi Territory representing Clairborne County[1] and was president of the council from 1809 to 1810, then again from 1812 to 1815.[2] In 1815 he resigned due to bad health.[3]
He lived in Port Gibson, Mississippi.[4]
He was involved with negotiations over commerce on the Mississippi River and a proposal for election districting.[5]