Elections to the United States House of Representatives for the 17th Congress were held at various dates in different states between July 1820 and August 1821 as President James Monroe won reelection unopposed.
Elections to the United States House of Representatives for the 16th Congress were held at various dates in different states between April 1818 and August 1819 during President James Monroe's first term. Also, newly admitted Alabama elected its first representatives in September 1819.
Elections to the United States House of Representatives for the 15th Congress were held at various dates in different states between April 1816 and August 1817.
Elections to the United States House of Representatives for the 14th Congress were held at various dates in different states between April 1814 and August 1815 during President James Madison's second term.
Elections to the United States House of Representatives for the 13th Congress were held at various dates in different states between April 1812 and August 1813 as James Madison was re-elected president.
Elections to the United States House of Representatives for the 12th Congress were held at various dates in different states between April 1810 and August 1811 during President James Madison's first term.
Elections to the United States House of Representatives for the 9th Congress were held at various dates in each state between April 24, 1804 and August 5, 1805. The Congress first met on December 2, 1805. The elections occurred at the same time as President Thomas Jefferson's re-election.
Elections to the United States House of Representatives for the 4th Congress were held on various dates in each state between August 25, 1794, and September 5, 1795 (Kentucky). The election was held during President George Washington's second term.
The United States Senate elections of 1818 and 1819 were elections for the United States Senate that had the Democratic-Republican Party gain two seats. The Federalists had only three seats being contested, of which they lost two and the third was left vacant due to a failure to elect.
The 1794 United States House of Representatives elections in New York were held on December 12, 1794, to elect ten U.S. Representatives to represent the State of New York in the United States House of Representatives of the 4th United States Congress.
Massachusetts elected its members November 2, 1818. Massachusetts's electoral law required a majority for election, necessitating additional elections in five districts on April 5, 1819 and July 26, 1819.
Louisiana held its first United States House of Representatives elections following its April 1812 admission to the Union on September 28–30, 1812. A special election for a seat in the 12th Congress and a general election for a seat in the 13th Congress were held at the same time, and had nearly-identical results.
In 1818, Uriel Holmes (F) of Connecticut's at-large district resigned from the House. A special election was held to fill the resulting vacancy.
During the 15th Congress, there were two special elections in the 6th district of Pennsylvania, both held in the year 1818. The 6th district at that time was a plural district with two seats, both of which became vacant at different times in 1818. The first vacancy was caused by John Ross (DR) resigning on February 24, 1818 and the second was caused by Samuel D. Ingham (DR) resigning July 6.
On April 20, 1818, Jacob Spangler (DR) resigned from Congress, where he'd represented Pennsylvania's 4th district. A special election was held that year to fill the resulting vacancy.
On January 1, 1818, a special election was held in North Carolina's 7th district to fill a vacancy left by the death of Representative-elect Alexander McMillan (F) before the 15th Congress had assembled.
On November 7, 1818, a special election was held in North Carolina's 11th district to fill a vacancy caused by Daniel M. Forney (DR)'s resignation earlier that year.
On February 21, 1818, Representative Peterson Goodwyn (DR) of Virginia's 19th district died in office. A special election was held to fill the resulting vacancy.
On April 20, 1818, Thomas B. Robertson (DR) of Louisiana's at-large district resigned. A special election was held to fill the resulting vacancy.
A special election was held in Massachusetts's 20th congressional district on March 16, 1818 to fill a vacancy left by the resignation of Albion K. Parris (DR) on February 3, 1818 after being named a judge of the United States District Court for the District of Maine.
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