The Forty-first 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 Grant's presidency. The apportionment of seats in the House of Representatives was based on the Eighth Census of the United States in 1860. Both chambers had a Republican majority.