| District | Vacated by | Reason for change | Successor | Date of successor's formal installation[a] |
|---|
- ^ When seated or oath administered, not necessarily when service began.
Use this template at the beginning of the "Changes in membership" section on the 100+ articles about the United States Congress, from 1st United States Congress through (at least) 117th United States Congress.
Note: The included article must have {{Notelist}}.
Per MOS:TABLECAPTION and basic functionality, please ensure to fill in 1= with an appropriate value, such as House or Senate.