Thomas Spight (October 25, 1841 – January 5, 1924) was an American lawyer and Confederate Civil War veteran who served seven terms as a U.S. Representative from Mississippi from 1898 to 1911.

Born near Ripley, Mississippi, Spight attended the common schools, Ripley Academy, Purdy (Tennessee) College, and the La Grange (Tennessee) Synodical College where he was a member of the Sigma (original) chapter of the Sigma Chi Fraternity.

In 1862, he became captain of Company B, Thirty-fourth Regiment, Mississippi Volunteer Infantry, and served until the close of the war.

Spight was elected as a Democrat to the Fifty-fifth Congress to fill the vacancy caused by the resignation of William V. Sullivan.

He again resumed the practice of his profession and also engaged in religious work until his death in Ripley, Mississippi, January 5, 1924.