The apportionment of seats in the House of Representatives was based on the 1790 United States census.

Senators were elected by the state legislatures 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.

All representatives were elected statewide on a general ticket.

The count below reflects changes from the beginning of this Congress There were 10 resignations, 2 new seats, and 1 election to replace an appointee.