The 116th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the Senate and the House of Representatives. It convened in Washington, D.C., on January 3, 2019, and ended on January 3, 2021, during the final two years of Donald Trump's first presidency. Senators elected to regular terms in 2014 finished their terms in this Congress, and House seats were apportioned based on the 2010 census.
In the November 2018 midterm elections, the Democratic Party won a new majority in the House, while the Republican Party increased its majority in the Senate. Consequently, this was the first split Congress since the 113th Congress of 2013–2015, and the first Republican Senate–Democratic House split since the 99th Congress of 1985–1987. This Congress was the youngest incoming class by mean age, compared to the previous three the incoming class of freshman representatives, and the most demographically diverse in history.