The Seventy-fifth United States Congress met in Washington, DC from January 3, 1937, to January 3, 1939, during the first two years of the second administration of U.S. President Franklin D. Roosevelt. (Because of the 20th amendment, starting in 1937 the new Presidential term began 17 days after that of the new Congress). The apportionment of seats in the House of Representatives was based on the Fifteenth United States Census, conducted in 1930. Both chambers had a Democratic supermajority.

The Seventy-sixth United States Congress met in Washington, DC from January 3, 1939, to January 3, 1941, during the seventh and eighth years of Franklin D. Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the Fifteenth Census of the United States in 1930. Both chambers had a Democratic majority.

The Seventy-seventh United States Congress met in Washington, DC from January 3, 1941, to January 3, 1943, during the ninth and tenth years of Franklin D. Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.

The Seventy-eighth United States Congress met in Washington, DC from January 3, 1943, to January 3, 1945, during the last two years of Franklin D. Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.

The Seventy-ninth United States Congress met in Washington, DC from January 3, 1945, to January 3, 1947, during the last months of Franklin D. Roosevelt's presidency, and the first two years of Harry Truman's presidency. The apportionment of seats in this House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.

The Eightieth United States Congress met in Washington, DC from January 3, 1947, to January 3, 1949, during the third and fourth years of Harry Truman's presidency. The apportionment of seats in this House of Representatives was based on the Sixteenth Census of the United States in 1940.

The Eighty-first United States Congress met in Washington, D.C. from January 3, 1949, to January 3, 1951, during the fifth and sixth years of Harry S. Truman's presidency. The apportionment of seats in this House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.

The Eighty-second United States Congress met in Washington, D.C. from January 3, 1951, to January 3, 1953, during the last two years of the second administration of U.S. President Harry S. Truman.
The apportionment of seats in this House of Representatives was based on the Sixteenth Census of the United States in 1940. Both chambers had a Democratic majority.

The Eighty-sixth United States Congress met in Washington, D.C. from January 3, 1959, to January 3, 1961, during the last two years of the presidency of Dwight D. Eisenhower. The apportionment of seats in the House of Representatives was based on the Seventeenth Census of the United States in 1950. Both chambers had a Democratic majority. When Alaska and Hawaii were admitted as states in 1959, the membership of the House temporarily increased to 437.

The Ninety-fourth United States Congress met in Washington, DC from January 3, 1975, to January 3, 1977, during the administration of U.S. President Gerald Ford. Both chambers had a Democratic majority.

The One Hundred First United States Congress met in Washington, DC from January 3, 1989, to January 3, 1991, during the final weeks of the administration of U.S. President Ronald Reagan and the first two years of the administration of U.S. President George H. W. Bush. Both chambers had a Democratic majority.

The One Hundred Second United States Congress met in Washington, DC from January 3, 1991, to January 3, 1993, during the last two years of the administration of U.S. President George H. W. Bush.

The One Hundred Third United States Congress met in Washington, D.C. from January 3, 1993, to January 3, 1995, during the final weeks of George H. W. Bush's presidency and the first two years of Bill Clinton's presidency. The apportionment of seats in the House of Representatives was based on the Twenty-first Census of the United States in 1990. Both chambers had a Democratic majority.

The One Hundred Fourth United States Congress met in Washington, D.C. from January 3, 1995, to January 3, 1997, during the third and fourth years of Bill Clinton's presidency. Apportionment of seats in the House of Representatives was based on the 1990 United States census. Both chambers had Republican majorities for the first time since the 1950s.

The One Hundred Fifth United States Congress met in Washington, DC from January 3, 1997, to January 3, 1999, during the fifth and sixth years of Bill Clinton's presidency. Apportionment of seats in the House of Representatives was based on the Twenty-first Census of the United States in 1990. Both chambers had a Republican majority.