Thomas Treadwell Davis (August 22, 1810 – May 2, 1872) was an American lawyer and politician in the U.S. state of New York.

He served as a United States representative from New York during the latter half of the American Civil War and the subsequent beginning of Reconstruction.

Davis was born in Middlebury, Vermont,[1] and moved to New York in 1817 with his parents who eventually settled in Clinton.

He held many political positions in New York and was elected as a Unionist candidate to the 38th Congress.

He was not a candidate for renomination in 1866 and after leaving Congress he resumed the practice of law in Syracuse.