List of United States Congress members who died in office (1950–1999)

This article lists members of the United States Congress (Senators and Representatives) who died while holding office between January 1, 1950, and December 31, 1999. The list is organized chronologically by date of death. It includes the member's name, state represented, chamber (Senate or House of Representatives), party affiliation at the time of death, and the date of death. A brief note regarding the cause of death, if readily and consistently available, is also included. This list serves as a historical record of unexpected vacancies in the United States Congress during the latter half of the 20th century. For deaths outside this date range, consult other resources.

Note: Information regarding the specific circumstances surrounding a member's death can be found in their individual biographical entries on Wikipedia or other reliable sources. This list aims to provide a concise overview of congressional deaths during this period. Filling a vacant congressional seat usually involves a special election (in the case of a House seat) or a temporary appointment followed by a special election (in the case of a Senate seat), depending on the laws of the state in question. The death of a member of Congress while in office can sometimes have significant political ramifications, potentially altering the balance of power in the chamber.