This is a complete list of individuals who have served as president pro tempore of the Idaho Senate to the present.

The president pro tempore, often abbreviated to "the pro tem", is a senator chosen from the majority party and elected by the entire Senate.

When the pro tem or his designee presides over the Senate, they maintain their ability to vote on all matters before the Senate, whereas the lieutenant governor only has a vote in the case of tie.

The pro tem is also second in line in succession to the governor.

The office has both administrative and policy roles, though the bulk of work on the Senate floor is largely delegated to the majority leadership.