The 3rd United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met at Congress Hall in Philadelphia, Pennsylvania from March 4, 1793, to March 4, 1795, during the fifth and sixth years of George Washington's presidency.

The apportionment of seats in the House of Representatives was governed by the Apportionment Act of 1792 and based on the 1790 census. The Senate had a Pro-Administration majority, and the House had an Anti-Administration majority.

There were no political parties in this Congress. Members are informally grouped into factions of similar interest, based on an analysis of their voting record.

Details on changes are shown below in the "Changes in membership" section.

This list is arranged by chamber, then by state. Senators are listed by class, and representatives are listed by district.

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.

The names of representatives are preceded by their district numbers.

The count below reflects changes from the beginning of the first session of this Congress