The 93rd United States Congress began on January 3, 1973. There were 11 new senators (six Democrats, five Republicans) and 68 new representatives (26 Democrats, 42 Republicans), as well as three new delegates (all Democrats), at the start of the first session. Additionally, seven senators (four Democrats, three Republicans) and 10 representatives (seven Democrats, three Republicans) took office on various dates in order to fill vacancies during the 93rd Congress before it ended on January 3, 1975.
Due to redistricting after the 1970 census, 17 representatives were elected from newly established congressional districts.