Runoff voting can refer to:
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Two-round system
The two-round system (TRS), also known as runoff voting, second ballot, or ballotage, is a voting method used to elect a single candidate, where voters cast a single vote for their preferred candidate. It generally ensures a majoritarian resu ...
, a voting system used to elect a single winner, whereby only two candidates from the first round continue to the second round, where one candidate will win.
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Instant-runoff voting
Instant-runoff voting (IRV) is a type of Ranked voting, ranked preferential Electoral system, voting method. It uses a Majority rule, majority voting rule in single-winner elections where there are more than two candidates. It is commonly referr ...
, an electoral system whereby voters rank the candidates in order of preference.
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Contingent vote
The contingent vote is an electoral system used to elect a single representative in which a candidate requires a majority of votes to win. It is a variation of instant-runoff voting (IRV). Under the contingent vote, the voter ranks the cand ...
, an instant-runoff (preferential, single round) version of the two-round system.
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Exhaustive ballot
The exhaustive ballot is a voting system used to elect a single winner. Under the exhaustive ballot the elector casts a single vote for their chosen candidate. However, if no candidate is supported by an overall majority of votes then the candid ...
, a reiterative voting system, whereby rounds of voting continue (with or without elimination) until one candidate achieves a majority, also called ''repeated balloting.''
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