The 99th United States Congress began on January 3, 1985. There were five new senators (three Democrats, two Republicans) and 41 new representatives (11 Democrats, 30 Republicans), as well as two new delegates (one Democrat, one Republican), at the start of the first session. Additionally, three senators (two Democrats, one Republican) and five representatives (four Democrats, one Republican) took office on various dates in order to fill vacancies during the 99th Congress before it ended on January 3, 1987.