1933–1943: 34 seats Following the 1930 census, the delegation lost two seats. 1943–1953: 33 seats Following the 1940 census, the delegation lost one seat. For the 78th Congress, there were 32 districts and 1 at-large seat. Starting with the 79th Congress, however, there were 33 districts. 1953–1963: 30 seats Following the 1950 census, the delegation lost three seats. 1963–1973: 27 seats Following the 1960 census, the delegation lost three seats. 1973–1983: 25 seats Following the 1970 census, the delegation lost two seats. 1983–1993: 23 seats Following the 1980 census, the delegation lost two seats. 1993–2003: 21 seats Following the 1990 census, the delegation lost two seats. 2003–2013: 19 seats Following the 2000 census, the delegation lost two seats. 2013–2023: 18 seats Following the 2010 census, the delegation lost one seat. With court-ordered redistricting in Pennsylvania on February 19, 2018, none of the members of congress who served in 115th Congress and were re-elected are in the same district in the 116th Congress. 2023–present: 17 seats Following the 2020 census, the delegation lost one seat. United States Senate Key See also List of United States congressional districts Pennsylvania's congressional districts Political party strength in Pennsylvania References Pennsylvania Politics of Pennsylvania Congressional delegations