4 candidates are tracked for New Hampshire House, Merrimack District 12 on the November 3, 2026 ballot: Brian Seaworth, Peter L. Mehegan, Mariana R. Beer and Kenneth Nivison. Candidate information follows official Merrimack County election filings; verify with the official election office linked below.
Brian Seaworth (Republican), Peter L. Mehegan (Republican), Mariana R. Beer (Democratic), Kenneth Nivison (Democratic) are on the November 3 ballot for New Hampshire House, Merrimack District 12; Brian Seaworth, Peter L. Mehegan are sitting members, per the General Court's official member list (gc.nh.gov). This is a two-seat district: voters choose up to two candidates, and the top two finishers are elected. Nominees are each party's top finishers in the September 8, 2026 state primary, per the Secretary of State's town-by-town results; nomination-paper candidates are not yet included.
State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.
This race. Voters choose 2; the top 2 finishers win seats. Elected by district: only voters who live in the district see this race on their ballot. Sitting officeholders on the ballot: Brian Seaworth, Peter L. Mehegan.
New Hampshire › Merrimack County › New Hampshire House, Merrimack District 12
Republican Incumbent
Per the campaign site.
Brian Seaworth, the sitting representative for New Hampshire House Merrimack District 12, is vice-chair of the Pembroke Planning Board and has served in the NH House since 2014, per his Citizens Count candidate profile.
Republican Incumbent
Per the campaign site.
Peter L. Mehegan, the sitting representative for New Hampshire House Merrimack District 12, has taught French and directed theater at Pembroke Schools for 40 years, per his Citizens Count candidate profile.
Democratic
Per the campaign site.
Mariana R. Beer, a Democratic candidate for New Hampshire House Merrimack District 12, is director of operations at Dunbarton Tobacco and Trust and serves on the Pembroke Budget Committee, per her Citizens Count candidate profile.
Democratic
Per the campaign site.
Kenneth Nivison, a Democratic candidate for New Hampshire House Merrimack District 12, is a history professor and serves on the Pembroke School Board, per his Citizens Count candidate profile.
Who is running for New Hampshire House, Merrimack District 12 in 2026?
4 candidates are tracked for New Hampshire House, Merrimack District 12 on the November 3, 2026 ballot: Brian Seaworth, Peter L. Mehegan, Mariana R. Beer and Kenneth Nivison. Candidate information follows official Merrimack County election filings; verify with the official election office linked below.
When is the New Hampshire House, Merrimack District 12 election in New Hampshire?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for New Hampshire are on the New Hampshire election hub at theballotbrief.com.
How do I see my exact Merrimack County ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official Merrimack County and state election office filings, last verified September 29, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official New Hampshire election office, or see the full Merrimack County sample ballot and your exact ballot by address.
47 tracked races in Merrimack County, New Hampshire. Landed here from another county's search? Look up your own ballot below.