- List of the Presidents of the United States Senate
Vice President of the United Statesis designated by the Constitution as, ex officio, President of the United States Senate. However, during a vacancy in the office (such as that caused by death or resignation), the President pro tempore of the United States Senateserves as the permanent President of the Senate. Until the ratification of the 25th Amendment to the United States Constitution, there was no mechanism to replace a Vice President until the next presidential election.
This list includes individuals (both Vice Presidents and Presidents pro tempore) who served as a Presiding Officer of the Senate (not including senators who presided over sessions temporarily in the place of the sitting President).
Acting Vice President of the United States
Presiding Officer of the United States Senate
Vice President of the United States
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