Thomas Dickens Arnold (May 3, 1798 – May 26, 1870) was an American politician who served two terms in the United States House of Representatives, representing Tennessee's 2nd district from 1831 to 1833, and the 1st district from 1841 to 1843. A staunch opponent of Andrew Jackson, he spent his first term in Congress trying to thwart the Jackson Administration's agenda, and subsequently helped establish the Whig Party in Tennessee. He was twice gerrymandered out of office by Jackson's allies in the $3.