Senators were elected over a wide range of time throughout 1828 and 1829, and a seat may have been filled months late or remained vacant due to legislative deadlock.

The Jacksonian coalition, despite its leader's victory in the presidential election, lost a seat in the Senate to the opposing Anti-Jacksonian coalition.

Senate party division at the beginning of the 21st United States Congress (1829–1831) Bold states link to specific election articles.

In these regular elections, the winner was seated on March 4, 1829; ordered by state.

John Raper Senator of Carroll County, Ga. murdered by George Blackwood Maine had two elections in this cycle.