The 96th United States Congress began on January 3, 1979. There were 12 new senators (seven Democrats, five Republicans) and 77 new representatives (42 Democrats, 34 Republicans, one Conservative), as well as one new delegate (a Republican), at the start of the first session. Additionally, four senators (one Democrat, three Republicans) and seven representatives (four Democrats, three Republicans) took office on various dates in order to fill vacancies during the 96th Congress before it ended on January 3, 1981.