Thomas Howell Cobb (September 7, 1815 – October 9, 1868) was an American political figure. A Southern Democrat, Cobb was a five-term member of the United States House of Representatives and Speaker of the House from 1849 to 1851. He also served as a Secretary of Treasury under President James Buchanan (1857–1860) and the 40th Governor of Georgia (1851–1853).