Columns: State (class) | Vacator | Reason for change | Successor | Date of successors formal installation
New Jersey (1) | James Schureman (F) | Resigned February 16, 1800 | Aaron Ogden (F) | Elected February 28, 1800 | Delaware (1) | Henry Latimer (F) | Resigned February 28, 1800 | Samuel White (F) | Appointed February 28, 1800 | New York (1) | James Watson (F) | Resigned March 19, 1800 | Gouverneur Morris (F) | Elected April 3, 1800 | Massachusetts (2) | Samuel Dexter (F) | Resigned May 30, 1800 | Dwight Foster (F) | Elected June 6, 1800 | New York (3) | John Laurance (F) | Resigned sometime in August, 1800 | John Armstrong (DR) | Elected November 6, 1800 | Massachusetts (1) | Benjamin Goodhue (F) | Resigned November 8, 1800 | Jonathan Mason (F) | Elected November 14, 1800