- This article is about voting with two criteria of majority needing to be satisfied. For a majority of 50% plus one vote, see either Majority or Absolute majority, for a marjority requiring an arbitrary level above 50% plus one vote, see Supermajority.
A double majority is the name given to a vote which requires a majority of votes according to two separate criteria. The mechanism is usually used to require strong support for any measure considered to be of great importance.
Examples of double majority
In the United States
Double majority is used in the United States for some votes on issues such as a tax levy or bond. This vote requires both a plurality of votes cast, and a majority of registered voters to cast votes in the election. This mechanism is used to prevent a small group from passing spending measures which affect the entire population in order to support their pet causes, especially at an election expected to have low voter turnout. Double majorities are also frequently used in municipal annexations, wherein majorities of both the residents in the annexing territory and the territory to be annexed must support the annexation.