99chambers

New Hampshire House of Representatives seat · lines in effect since 2022

New Hampshire House of Representatives: State House District Merrimack 12

A district of about 7,400 people, 32% of adults with a bachelor's degree. It votes in line with the nation for president.

Brian Seaworth (R) · since Nov 2, 2010Peter Mehegan (R) · since Nov 5, 2024Next election Nov 7, 2028The 2026 race →

Where it sits among all 164 seats

Every New Hampshire House of Representatives seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

Even92nd most
Democratic
Most DemocraticMost Republican83rd seat · the majority lineDistrict 612

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

20222024
New Hampshire House of RepresentativesR+1.5R+3.6

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 164 seats. Small marks are other seats in New Hampshire. The black marker is District 612.

Adults with a bachelor's degree32% 27th pct · 117th of 159 in NH

Lower than 73% of seats.

White adults without a degree66% 84th pct · 27th of 159 in NH

Higher than 84% of seats.

Hispanic residents3% 51st pct · 78th of 159 in NH

Higher than 51% of seats.

Black residents1% 47th pct · 84th of 159 in NH

Lower than 53% of seats.

Asian residents0% 23rd pct · 122nd of 159 in NH

Lower than 77% of seats.

People per square mile326 54th pct · 74th of 159 in NH

Denser than 54% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean. 1 of the 4 flipped this year.

District 805
30% college gradsR+3.2Flipped DDistrict 5
27% college gradsR+7.6SplitDistrict 210
30% college gradsR+2.7Held DDistrict 213
37% college gradsD+5.4Held D

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Who has held it

These lines took effect in 2022.

  1. Democratic (D)
    2027– · Won 2026 unopposed
  2. Peter L. Mehegan (R)
    2025–2027 · Won 2024 by 4.1
  3. Dianne E. Schuett (D)
    2023–2025 · Won 2022 by 5.7
  4. Brian Seaworth (R)
    2023–2027 · Won 2022 by 1.5, 2024 by 3.6

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)