1820–21 United States Senate elections

← 1818 & 1819 Dates vary by state 1822 & 1823 →
15 of the 46 seats in the United States Senate (plus special elections) 24 seats needed for a majority
Majority party Minority party   Party Democratic-Republican Federalist Last election 30 seats 9 seats Seats before 37 9 Seats won 11 1 Seats after 38 5 Seat change 1 4 Seats up 10 5
Results:      Dem-Republican hold      Dem-Republican gain      Federalist hold      Legislature Failed To Elect
Majority Party before election Democratic-Republican Elected Majority Party Democratic-Republican

The 1820–21 United States Senate elections were held on various dates in various states, corresponding with James Monroe's landslide re-election. As these U.S. Senate elections were prior to the ratification of the Seventeenth Amendment in 1913, senators were chosen by state legislatures. Senators were elected over a wide range of time throughout 1820 and 1821, and a seat may have been filled months late or remained vacant due to legislative deadlock.^[1] In these elections, terms were up for the senators in Class 1.

The Democratic-Republican Party gain one-to-five seats (in the general and special elections), assuming almost complete control of the Senate.

Results summary

Senate party division, 17th Congress (1821–1823)

• Majority party: Democratic-Republican (39–43)
• Minority party: Federalist (4)
• Vacant: (3–1)
• Total seats: 46–48

Change in composition

Before the elections

Composition after the June 13 and 14, 1820 elections in Maine.

Result of the general elections