The apportionment of seats in the House of Representatives was based on the 1930 United States census.

The Democrats increased their majorities in both the House and Senate, resulting in a supermajority in both chambers, and along with President Franklin D. Roosevelt maintained an overall federal government trifecta.

[1][2] Section contents: Senate: Majority (D), Minority (R) • House: Majority (D), Minority (R) Senators are popularly elected statewide every two years, with one-third beginning new six-year terms with each Congress.

Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election, In this Congress, Class 2 meant their term ended with this Congress, facing re-election in 1936; Class 3 meant their term began in the last Congress, facing re-election in 1938; and Class 1 meant their term began in this Congress, facing re-election in 1940.

The directory after the pages of terms of service lists committees of the Senate, House (Standing with Subcommittees, Select and Special) and Joint and, after that, House/Senate committee assignments.