1900 United States elections

The 1900 United States elections elected the 57th United States Congress. The election was held during the Fourth Party System. Republicans retained control of the presidency and both houses of Congress, while third parties suffered defeats.

In a re-match of the 1896 presidential election, Republican President William McKinley defeated Democratic former Representative William Jennings Bryan of Nebraska. McKinley's previous running mate, Vice President Garret Hobart, had died in office, so the Republicans nominated New York Governor Theodore Roosevelt as their vice presidential candidate. McKinley again won by a comfortable margin in both the popular vote and the electoral college, and he picked up a handful of states in the West and the Midwest. McKinley's win made him the first sitting president to win re-election since Ulysses S. Grant in 1872.

Republicans won minor gains in the House, maintaining their majority.

In the Senate, the Democrats made moderate gains while the Populist Party lost three seats. Republicans continued to maintain a commanding majority in the chamber.