The apportionment of seats in this House of Representatives was based on the 1970 census.

Both chambers retained a Democratic majority (though downgraded from the supermajority status in the previous Congress), and with President Carter, maintained an overall federal government trifecta.

This is the most recent Congress to feature a Democratic senator from Idaho, Frank Church, who lost re-election in 1980.

The names of members of the House of Representatives are preceded by their district numbers.

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.