Thomas Howell Cobb (September 7, 1815 – October 9, 1868) was an American political figure.

A Southern Democrat, Cobb is a five-term member of the United States House of Representatives and Speaker of the House from 1849 to 1851.

He also serves as a Secretary of Treasury under President James Buchanan (1857–1860) and the 40th Governor of Georgia (1851–1853).

He is, however, probably best known as one of the founders of the Confederate States of America, having served as the President of the Provisional Confederate Congress, when delegates of the secessionist states issue the creation of the Confederacy.

Cobb serves for two weeks between the foundation of the Confederacy and the election of Jefferson Davis as first President.

This makes him, as the Speaker of the Congress, provisional Head of State at this time.