Williamson Robert Winfield Cobb (June 8, 1807 – November 1, 1864) was an American politician who served the state of Alabama in the U.S. House of Representatives between 1847 and 1861. He was born in Rhea County, Tennessee on June 8, 1807 to David Cobb and Martha Bryant. He moved with his father, David Cobb, in 1809 to Bellefonte, Jackson County, Alabama. Cobb received a limited education and worked as a clock peddler and merchant in Bellefonte before being elected to the Alabama House of Representatives in 1844. In 1846 he was elected as a Democrat to the U.S. House of Representatives from Alabama's sixth congressional district, which then included Huntsville and the mountainous counties of northeast Alabama, including Cobb's home county of Jackson, carved out of Madison in 1819. Cobb was reelected to six additional terms, consistently defeating more affluent, better educated opponents from Huntsville, including Clement Claiborne Clay, by the majority vote of the plain folk of the hill country.