Dixon Hall Lewis (August 10, 1802 – October 25, 1848) was an American politician who served as a Representative and a Senator from Alabama.

That same year he constructed a house ("Old Homestead") in the town of Lowndesboro, Alabama, twenty miles west of the state capitol in Montgomery.

He was elected as a States Rights Democrat to the twenty-first and to the seven succeeding Congresses and served from March 4, 1829, to April 22, 1844, when he resigned the House to join the Senate.

[1] In 1844 Lewis was appointed by his brother-in-law Governor Benjamin Fitzpatrick to the United States Senate to fill the vacancy caused by the resignation of William R. King in 1844.

"[2] A strikingly obese figure, Lewis was known to weigh as much as 500 pounds (227 kg), making him the heaviest member of Congress ever.