Plurality vs. Majority: What's the Difference in Elections?

A plurality means getting more votes than anyone else, even if that’s well under half. A majority means getting more than half of the votes cast. With only two candidates the winner has both, but in a three-way race someone can win a plurality with 40% while 60% of voters preferred someone else. Most US elections are decided by plurality; a few states require a majority and hold a runoff when no one gets one.

What’s the difference, with an example? #

Take 100 votes in a three-candidate race:

• Under plurality rules, A wins with 45%, the most votes.
• Under majority rules, no one wins yet, because nobody has more than 50 votes. The race goes to a runoff or, with ranked ballots, to another counting round.

The math of a majority #

A majority is any share greater than half of the valid votes cast. With 1,000 votes, that’s 501. With 1,001 votes, it’s also 501. “Fifty percent plus one” is the common shorthand, though it’s only exact when the total is even.

The math of a plurality #

There’s no minimum. In a ten-candidate race, 15% could win if everyone else gets less. Plurality is sometimes called a “relative majority.”

How does plurality voting work in the US? #

Most US offices, including nearly all House and Senate general elections, use first-past-the-post: each district elects one person, voters pick one candidate, and the top vote-getter wins.

It’s simple and fast to count, and it produces a clear winner in one election. Its known weakness is the spoiler effect. When two candidates with similar supporters split a majority between them, a third candidate with a cohesive minority can win. That pressure pushes voters to abandon candidates they like but think can’t win, and it pushes like-minded candidates to drop out.

Over time this tends to produce two dominant parties, a pattern political scientists call Duverger’s law. Third parties aren’t impossible under plurality rules, but they rarely win seats and often end up affecting who wins between the two big parties.

How do majority systems produce a winner? #

When a majority is required and a multi-candidate field doesn’t produce one, there are two main ways to get there.

Runoff elections #

If no one clears 50%, the top two finishers meet again a few weeks later. One of them is then guaranteed a majority.

• Georgia requires a majority in both primaries and general elections. That’s why control of the US Senate in early 2021 came down to two January runoffs.
• Primary runoffs are used in about ten states, mostly in the South, including Alabama, Arkansas, Mississippi, Oklahoma, South Carolina and Texas. Some set lower thresholds: North Carolina’s runoff trigger is 30%, not 50%.
• Louisiana holds its 2026 House races on an all-candidate ballot on November 3, with a December 12 runoff if no one tops 50%.

Runoffs cost money, require a second campaign, and usually draw fewer voters than the first round.

Ranked-choice (instant runoff) voting #

Voters rank the candidates. If no one has a majority of first choices, the last-place candidate is eliminated and those ballots move to their next choice, repeating until someone has a majority of the remaining ballots. Maine and Alaska use it for federal elections, along with dozens of cities. See how ranked-choice voting works for a worked example. At least 18 states have banned it, so its reach has limits.

Plurality vs. majority systems compared #

There’s also approval voting, where voters mark every candidate they find acceptable and the most-approved wins. It’s used in a couple of cities. Our explainer on approval voting covers it.

Where else do majorities matter? #

• The Electoral College requires an absolute majority, 270 of 538 electoral votes. If no one gets it, the House chooses the president with one vote per state delegation. See what happens in an Electoral College tie.
• Congress passes bills by simple majority of those voting, but some actions need a supermajority: 60 senators to end debate on most legislation, two-thirds of each chamber to override a veto or propose a constitutional amendment, and three-quarters of states to ratify one.
• Speaker of the House elections need a majority of votes cast for a named person, which is why they can take multiple ballots.

Why this matters when you read polls #

In a plurality race, a poll showing 42–38–15 means the leader could win without ever reaching 45%. In a majority race with a runoff, the same poll tells you who’s likely to make the runoff, and the question becomes where the third candidate’s voters go. In a ranked-choice race, a good poll asks for second choices and simulates the elimination rounds.

For multi-candidate races, Election Tracker, our free iPhone app, shows every candidate pollsters publish for each Senate, governor and 2028 primary race, with a 30-day average for candidates who appear in enough polls. A minor candidate tested in only one poll stays on that poll’s card rather than getting an average line from too little data, which keeps crowded primary fields readable.

Frequently asked questions #

Can a candidate win without a majority? #

Yes, in most US elections. Plurality rules award the seat to whoever gets the most votes, so candidates regularly win three-way races with less than half.

What is an absolute majority? #

It usually means more than half of all eligible members or votes, not just those voting. For example, cloture in the Senate needs three-fifths of senators “duly chosen and sworn,” regardless of how many are present. A simple majority counts only the votes actually cast.

Is a supermajority the same as a majority? #

No. A supermajority is a set threshold above half, such as three-fifths or two-thirds. It’s used for decisions designed to require broad agreement, like overriding a veto.

Why doesn’t the US use majority voting everywhere? #

States run their own elections, and most prefer plurality for its simplicity and low cost. Moving to runoffs or ranked-choice voting requires state law changes, and a growing number of states have banned ranked-choice voting outright.