After the resignation of Spiro Agnew, Gerald Ford was appointed under the authority of the newly ratified Twenty-fifth Amendment to the United States Constitution.

Ford became president the next year and Nelson Rockefeller was appointed in his place.

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

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.