The 1st United States Congress, comprising the United States Senate and the United States House of Representatives, met from March 4, 1789, to March 4, 1791, during the first two years of George Washington's presidency, first at Federal Hall in New York City and later at Congress Hall in Philadelphia. With the initial meeting of the First Congress, the United States federal government officially began operations under the new frame of government established by the 1787 Constitution. The apportionment of seats in the House of Representatives was based on the provisions of Article I, Section 2, Clause 3, of the Constitution. Both chambers had a Pro-Administration majority. Twelve articles of amendment to the Constitution were passed by this Congress and sent to the states for ratification; the ten ratified as additions to the Constitution on December 15, 1791, are collectively known as the Bill of Rights, with an additional amendment ratified more than two centuries later to become the Twenty-seventh Amendment to the United States Constitution.
The 3rd United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met at Congress Hall in Philadelphia, Pennsylvania from March 4, 1793, to March 4, 1795, during the fifth and sixth years of George Washington's presidency.
The 5th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met at Congress Hall in Philadelphia, Pennsylvania, from March 4, 1797, to March 4, 1799, during the first two years of John Adams' presidency. In the context of the Quasi-War with France, the Alien and Sedition Acts were passed by Congress. The Acts were overwhelmingly supported by the Federalists and mostly opposed by the Democratic-Republicans. Some Democratic-Republicans, such as Timothy Bloodworth, said they would support formally going to war against France but they opposed the Alien and Sedition Acts which Bloodworth and others believed were unconstitutional.
The 6th United States Congress was the 6th meeting of the legislative branch of the United States federal government, consisting of the Senate and the House of Representatives. It initially met at Congress Hall in Philadelphia, Pennsylvania and then was the first congress to meet in the new Capitol Building in Washington, D.C.. Its term was from March 4, 1799, to March 4, 1801, during the last two years of John Adams's presidency. It was the last Congress of the 18th century and the first to convene in the 19th. The apportionment of seats in House of Representatives was based on the 1790 United States census. Both chambers had a Federalist majority. This was the last Congress in which the Federalist Party controlled the presidency or either chamber of Congress.
The 7th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1801, to March 4, 1803, during the first two years of Thomas Jefferson's presidency. The apportionment of seats in the House of Representatives was based on the 1790 United States census. Both chambers had a Democratic-Republican majority, except when the Senate held a two-day Special Senate session in order to attend Jefferson’s inauguration, when there was still a Federalist majority in the Senate.
The 16th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1819, to March 4, 1821, during the third and fourth years of James Monroe's presidency. The apportionment of seats in the House of Representatives was based on the 1810 United States census. Both chambers had a Democratic-Republican majority.
The 18th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1823, to March 4, 1825, during the seventh and eighth years of James Monroe's presidency. The apportionment of seats in the House of Representatives was based on the 1820 United States census. Both chambers had a Democratic-Republican majority.
The 30th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1847, to March 4, 1849, during the last two years of the administration of President James K. Polk. The apportionment of seats in the House of Representatives was based on the 1840 United States census. The Senate had a Democratic majority, and the House had a Whig majority. It was the only Congress in which Abraham Lincoln served.
The 72nd United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1931, to March 4, 1933, during the last two years of Herbert Hoover's presidency. The apportionment of seats in this House of Representatives was based on the 1910 United States census. The Senate had a Republican majority. The House started with a very slim Republican majority, but by the time it first met in December 1931, the Democrats had gained a majority through special elections.
The 31st United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1849, to March 4, 1851, during the 16 months of the Zachary Taylor presidency and the first eight months of the administration of Millard Fillmore's. The apportionment of seats in this House of Representatives was based on the 1840 United States census. The Senate had a Democratic majority, while there was a Democratic plurality in the House.
The 74th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1935, to January 3, 1937, during the third and fourth years of Franklin D. Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the 1930 United States census.
The 38th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1863, to March 4, 1865, during the last two years of President Abraham Lincoln's first term in office. The apportionment of seats in the House of Representatives was based on the 1860 United States census. The Senate had a Republican majority, and the House of Representatives had a Republican plurality.
The 39th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1865, to March 4, 1867, during Abraham Lincoln's final month as president, and the first two years of the administration of his successor, Andrew Johnson.
The 70th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1927, to March 4, 1929, during the last two years of Calvin Coolidge's presidency. The apportionment of seats in the House of Representatives was based on the 1910 United States census.
The 37th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1861, to March 4, 1863, during the first two years of Abraham Lincoln's presidency. The apportionment of seats in the House of Representatives was based on the 1850 United States census.
The 41st United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1869, to March 4, 1871, during the first two years of Ulysses S. Grant's presidency. The apportionment of seats in the House of Representatives was based on the 1860 United States census. Both chambers had a Republican majority.
The 54th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1895, to March 4, 1897, during the last two years of Grover Cleveland's second presidency. The apportionment of seats in the House of Representatives was based on the 1890 United States census. The House had a Republican majority, and the Republicans were the largest party in the Senate.
The 1792–93 United States House of Representatives elections were held on various dates in various states between August 27, 1792, and September 6, 1793. Each state set its own date for its elections to the House of Representatives before the first session of the 3rd United States Congress convened on December 2, 1793. With the addition of the new state of Kentucky's representatives, and the congressional reapportionment based on the 1790 United States census, the size of the House increased to 105 seats.
The 1790–91 United States House of Representatives elections were held on various dates in various states between April 27, 1790, and October 11, 1791. Each state set its own date for its elections to the House of Representatives before or after the first session of the 2nd United States Congress convened on October 24, 1791. This was the first midterm election cycle, which took place in the middle of President George Washington's first term. The size of the House increased to 67 seats after the new state of Vermont elected its first representatives.
The 1792–93 United States Senate elections were held on various dates in various states, coinciding with President George Washington's unanimous 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 1792 and 1793, and a seat may have been filled months late or remained vacant due to legislative deadlock. In these elections, terms were up for the ten senators in Class 2.
