They occurred while Jacksonians soundly took control of the presidency, with Andrew Jackson's victory, they greatly increased their majority in Congress.

Outgoing President John Quincy Adams's unpopularity played a major role in the Jacksonian pickup, as did the perception of the Anti-Jacksonian Party as urban and elitist.

Alabama elected its members August 3, 1829, after the term began but before Congress convened.

Connecticut elected its members April 29, 1829, after the term began but before Congress convened.

Maryland elected its members October 5, 1829, after the term began but before Congress convened.

North Carolina elected its members August 13, 1829, after the term began but before Congress convened.

Rhode Island elected its members August 27, 1829, after the term began but before Congress convened.

Virginia elected its members in April 1829 after the term began but before Congress convened.