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| 2018 New Hampshire State Legislature elections | |
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| General | November 6, 2018 |
| Primary | September 11, 2018 |
| 2018 elections | |
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| Choose a chamber below: | |
The Republican primary elections for the seats in the New Hampshire State Senate and New Hampshire House of Representatives were on September 11, 2018. For information about the Democratic primary elections in New Hampshire, click here.
The general election was on November 6, 2018. The candidate filing deadline was June 15, 2018. In the state Senate, all 24 seats were up for election. In the state House, all 400 seats were up for election.
Sixty-six state House Republicans did not seek re-election in 2018.
One state Senate Republican did not seek re-election in 2018.
Ten state House Republicans were defeated in the primaries.
| Year | Total seats | Open seats | Total candidates | Democratic primaries contested | Republican primaries contested | Total contested | Incumbents contested in primaries | Total incumbents contested in primaries |
|---|---|---|---|---|---|---|---|---|
| 2018 | 424 | 105 | 866 | 34 | 36 | 15.4% | 86 | 27.0% |
| 2016 | 424 | 117 | 865 | 25 | 52 | 16.9% | 125 | 40.7% |
| 2014 | 424 | 122 | 878 | 20 | 57 | 16.9% | 98 | 32.5% |
The tables below show the partisan breakdowns of the New Hampshire House of Representatives and the New Hampshire State Senate as of September 2018:
| Party | As of September 2018 | |
|---|---|---|
| Democratic Party | 173 | |
| Republican Party | 216 | |
| Libertarian Party | 2 | |
| Vacancies | 9 | |
| Total | 400 | |
| Party | As of September 2018 | |
|---|---|---|
| Democratic Party | 10 | |
| Republican Party | 14 | |
| Vacancies | 0 | |
| Total | 24 | |
Ballotpedia identified battleground races in the 2018 New Hampshire state legislative Republican primary elections. These primaries had the potential to be more competitive than other races and could have led to changes in the membership of the Republican caucus or had an impact on general election races.
To determine the New Hampshire state legislative Republican primary battleground races in 2018, Ballotpedia examined races that fit one or more of the three factors listed below:
This section provides an overview of media reactions to the New Hampshire state legislative Republican primaries.[7] Selected articles are presented as a jumping-off point for deeper exploration of media coverage and as an overview of narratives that have emerged surrounding the elections.
A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. New Hampshire uses a semi-closed primary system. Unaffiliated voters may vote in the primary, but in order to do so, they have to choose a party before voting. This changes their status from unaffiliated to affiliated with that party unless they fill out a card to return to undeclared status.[8][9]
For information about which offices are nominated via primary election, see this article.
In New Hampshire, polling place hours of operation vary. According to state law, polling places must be open between 11:00 a.m. and 7:00 p.m. Eastern Time. Localities may set their own polling hours as long as they are open during those hours prescribed by state law.[10] Anyone in line when the polls close must be allowed to vote.[11] To search for the hours your polling place is open, click here.
To register to vote in New Hampshire, each applicant must provide documentary proof of United States citizenship, be a resident of New Hampshire, and be at least 18 years old by the next election. Individuals may register to vote at the local clerk's office, with the community's supervisors of the checklist or registrar of voters, or at the polling place on the day of the election.[12][13] Absentee registration is allowed for those who meet the following criteria:
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You may register to vote by absentee (by mail) if one of the following is true:
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Absentee registration requires mailing a voter registration form and a witnessed absentee voter registration affidavit to the local clerk. Absentee registrants must still provide proof of citizenship and age unless they were previously or currently registered to vote.[12][15]
New Hampshire does not practice automatic voter registration.[16]
New Hampshire does not permit online voter registration.
New Hampshire allows same-day voter registration.[12]
In New Hampshire, citizens can register to vote the day they move to the state.[12]
New Hampshire requires voters to provide proof of citizenship when registering to vote. Gov. Chris Sununu (R) signed HB 1569 into law on September 17, 2024. The legislation required voter registration applicants to provide one of the following at the time of registration: "birth certificate, passport, naturalization papers if the applicant is a naturalized citizen, or any other reasonable documentation which indicates the applicant is a United States citizen."[17]
All 49 states with voter registration systems require applicants to declare that they are U.S. citizens in order to register to vote in state and federal elections, under penalty of perjury or other punishment.[18] Seven states — Alabama, Arizona, Georgia, Kansas, Louisiana, New Hampshire, and Wyoming — have laws requiring verification of citizenship at the time of voter registration, whether in effect or not. One state, Ohio, requires proof of citizenship only when registering to vote at a Bureau of Motor Vehicles facility. In three states — California, Maryland, and Vermont — at least one local jurisdiction allows noncitizens to vote in some local elections. Noncitizens registering to vote in those elections must complete a voter registration application provided by the local jurisdiction and are not eligible to register as state or federal voters.
The New Hampshire Secretary of State’s office allows residents to check their voter registration status online by visiting this website.
New Hampshire requires voters to present photo identification while voting.[19]
The following list of accepted ID was current as of December 2025. Click here for the New Hampshire Secretary of State page on accepted ID to ensure you have the most current information.
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To view New Hampshire law pertaining to voter identification, click here.
Additionally, a moderator or other election official may verify the voter’s identity.[19]
A voter may obtain a free photo ID for voting purposes by presenting a voucher from their local clerk or the New Hampshire Secretary of State to any New Hampshire Department of Motor Vehicles office that issues identification.[19]
New Hampshire does not permit early voting.
Early voting permits citizens to cast ballots in person at a polling place prior to an election. In states that permit no-excuse early voting, a voter does not have to provide an excuse for being unable to vote on Election Day. States that allow voters to cast no-excuse absentee/mail-in ballots in person are counted as no-excuse early voting states.
Forty-seven states and the District of Columbia permit no-excuse early voting.
A voter is eligible to vote absentee in an election if he or she cannot make it to the polls on Election Day for one of the following reasons:[20]
Voters requesting an absentee ballot by mail must do so by 12:00 p.m. the day before the election. The deadline for in-person absentee ballot requests is 5:00 p.m. the day before the election.[20]
The completed ballot must be received by a local clerk by 5:00 p.m. on Election Day.[21] A voter must include a photocopy of a valid photo identification or a notarized signature with the absentee ballot application. Voters may also present photo identification at a town clerk’s office to request an absentee ballot.[20][22]