Thomas Morris (January 3, 1776 – December 7, 1844) was an American politician from Ohio who served in the United States Senate and was a member of the Democratic Party.

Morris was born in Berks County, Pennsylvania, and enlisted as a Ranger to fight the Indians in 1793.

On May 12, 1806, shortly after the beginning of the 1806–1807 term of the Ohio House of Representatives, Morris contested the election of David C. Bryan and was awarded the seat from Clermont County.

[1] Morris served in the Ohio State House of Representatives for Clermont County in 1806–1807, 1808–1809, 1810–1811, and 1820–1821.

"[5] He also argues that Morris "awakened (Salmon Chase) to the character of the Slave Power and to the need for political organization to combat its influences," leading the way for the term Slave Power to enter the American political jargon and paving the way for the creation of the Republican Party.