The 55th 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 March 4, 1897, to March 4, 1899, during the first two years of William McKinley's presidency. The apportionment of seats in the House of Representatives was based on the 1890 United States census. Both chambers had a Republican majority. There was one African-American member, George Henry White, a Republican from the state of North Carolina, and one Kaw member, Charles Curtis, a Republican from Kansas.

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.