A write-in candidate is a candidate whose name does not appear on the ballot but seeks election by asking voters to cast a vote for the candidate by physically writing in the person's name on the ballot. Depending on electoral law it may be possible to win an election by winning a sufficient number of such write-in votes, which count equally as if the person were formally listed on the ballot.
Writing in a name that is not already on the election ballot is a permitted practice in the United States. Some other jurisdictions have also allowed this practice. In the United States, there are variations in laws governing write-in candidates, depending on the office (federal or local) and whether the election is a primary election or the general election; general practice is an empty field close by annotated to explain its purpose on the ballot if it applies. In five U.S. states there are no elections to which it can apply, under their present laws. Election laws are enacted by each state and in the District of Columbia, to apply to their voters.
How to write in the name
Some U.S. states and local jurisdictions allow a voter to affix a sticker, with the write-in candidate's name, to the ballot in lieu of actually writing in the candidate's name.
Write-in candidacies are sometimes a result of a candidate being legally or procedurally ineligible to run under their own name or party; write-in candidacies may be permitted where term limits bar an incumbent candidate from being officially nominated for, or being listed on the ballot for, re-election. They are also typically used when a candidate, often an incumbent, has lost a primary election but still wishes to contest the general election.
In some cases, write-in campaigns have been organized to support a candidate who is not personally involved in running; this may be a form of draft campaign.
Write-in candidates may have to register as candidates
Write-in candidates have won elections on rare occasions. Also, write-in votes are sometimes cast for ineligible people or fictional characters, often as a form of protest vote.
Some jurisdictions require write-in candidates be registered as official candidates before the election. This is standard in elections with a large pool of potential candidates, as there may be multiple candidates with the same name that could be written in.
The spoiler effect
In some cases, the number of write-in votes cast in an election is greater than the entire margin of victory, suggesting that the write-ins may have been sufficient to tip the balance and change the outcome of the election by creating a spoiler effect.
Primary elections in the United States
Many U.S. states and municipalities allow for write-in votes in a partisan primary election where no candidate is listed on the ballot to have the same functional effect as nominating petitions: for example, if there are no Reform Party members on the ballot for state general assembly and a candidate receives more than 200 write-in votes when the primary election is held (or the other number of signatures that were required for ballot access), the candidate will be placed on the ballot on that ballot line for the general election. In most places, this provision is in place for non-partisan elections as well.
Write-in option in a referendum
A write-in option may occasionally be available in a multiple-choice referendum; for example in the January 1982 Guamanian status referendum.
Contrast from a blank ballot election system
alt=A blank ballot piece of folded card with an empty circle printed on the right-side were voter have to write the unique number assigned to their preferred candidate.|thumb|[[2018 Finnish presidential election ballot]]
The term "write-in candidate" is used in elections in which names of candidates or parties are preprinted on a paper ballot or displayed on an electronic voting machine. The term is not generally used in elections in which all ballots are blank and thus all voters must write in the names of their preferred candidates. Blank ballot election systems reduce the cost of printing the ballots, but increase the complexity of casting and counting votes.
Such systems are used in Japan, and were used in the past in the French Second Republic and in elections in the Philippines from World War II until the 2010 general election. Unusually, this system was also used in Canada for the 2025 Battle River—Crowfoot federal by-election, due to over 200 candidates having been nominated; the election had been targeted by the Longest Ballot Committee, whose previous efforts had resulted in unwieldy preprinted ballots with as many as 91 candidates.
Some systems use a semi-blank ballot, such as Finland, where the voter must fill in a candidate's given number or letter from a separate ballot, but where there is a clear-cut arrangement with a circle or box with a description of how to vote for a given candidate. Blank-ballot systems typically require candidates to be nominated in advance.
United States
[[File:US write-in 2024.svg|thumb|250px|Requirements for write-in candidates in the 2024 United States general election
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The requirements to appear on the general election ballot as an independent candidate or to have write-in votes counted vary by state and by political office sought.
As of 2024, 40 states and the District of Columbia allow write-in votes on their ballots, including for president; Alaska, New Mexico and South Carolina allow write-in candidates for some offices but not for president; Mississippi allows write-in votes only to substitute a candidate listed on the ballot who was removed, withdrew or died; Arkansas, Hawaii, Louisiana, Nevada, Oklahoma and South Dakota do not allow any write-in votes. Most of the jurisdictions allowing write-in votes require that the write-in candidates register by a certain date for their votes to be counted. Typically this registration consists only of a declaration of candidacy, but some states also require signatures of a certain number of voters, additional paperwork or fees. The deadline to register as a write-in candidate is usually later than to petition to be listed on the ballot.
2024 presidential general election
{| class="wikitable sortable" style="line-height:1.3"
|+Requirements for independent candidates for president in the 2024 United States general election
! rowspan=2|State or district !! colspan=3|Petition to be listed on ballot !! colspan=3|Registration as write-in candidate !! rowspan=2 class=unsortable|Sources
|-
! signatures !! data-sort-type=currency|fee !! deadline !! signatures !! data-sort-type=currency|fee !! deadline
|-
|Alabama || align=right|5,000 || align=right|— || || colspan=3 ||
|-
|Alaska || align=right|3,614 || align=right|— || || colspan=3 ||
|-
|Arizona || align=right|42,303 || align=right|— || || align=right|— || align=right|— || ||
|-
|Arkansas || align=right|5,000 || align=right|— || || colspan=3 ||
|-
|California || align=right|219,403 || align=right|— || || align=right|— || align=right|— || ||
|-
|Colorado || align=right|12,000 || align=right|— || || align=right|— || align=right|— || ||
|-
|Connecticut || align=right|7,500 || align=right|— || || align=right|— || align=right|— || ||
|-
|Delaware || align=right|7,690 || align=right|— || || align=right|— || align=right|— || ||
|-
|District of Columbia || align=right|4,573 || align=right|— || || align=right|— || align=right|— || ||
|-
|Florida || align=right|145,040 || align=right|— || || align=right|— || align=right|— || ||
|-
|Georgia || align=right|7,500 || align=right|— ||