99chambers

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

New Hampshire House of Representatives: State House District Rockingham 18

A district of about 7,300 people, 43% of adults with a bachelor's degree. It votes R+14.6 relative to the nation for president.

Debra DeSimone (R) · since Nov 4, 2008Jay Markell (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.

R+14.6134th most
Democratic
Most DemocraticMost Republican83rd seat · the majority lineDistrict 718

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+14.2R+10.3

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 718.

Adults with a bachelor's degree43% 59th pct · 66th of 159 in NH

Higher than 59% of seats.

White adults without a degree55% 53rd pct · 75th of 159 in NH

Higher than 53% of seats.

Hispanic residents3% 58th pct · 68th of 159 in NH

Higher than 58% of seats.

Black residents0% 0th pct · 136th of 159 in NH

Lower than 100% of seats.

Asian residents3% 75th pct · 40th of 159 in NH

Higher than 75% of seats.

People per square mile641 66th pct · 55th of 159 in NH

Denser than 66% 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.

District 713
37% college gradsR+10.7SplitDistrict 703
41% college gradsR+17.7Held RDistrict 725
39% college gradsR+17.5SplitDistrict 514
47% college gradsR+9.6Held R

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. Republican (R)
    2027– · Won 2026 by 14.3
  2. Jay Markell (R)
    2025–2027 · Won 2024 by 10.3
  3. Debra L. Desimone (R)
    2023–2027 · Won 2022 by 17.6, 2024 by 16.9
  4. Arlene Quaratiello (R)
    2023–2025 · Won 2022 by 14.2

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