99chambers

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

New Hampshire House of Representatives: State House District Rockingham 20

A district of about 13,000 people, 36% of adults with a bachelor's degree. It votes R+16.5 relative to the nation for president.

Bob Harb (R) · since Nov 6, 2018Charlie Melvin (R) · since Nov 6, 2018Jim Summers (R) · since Nov 2, 2010Next 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+16.5139th most
Democratic
Most DemocraticMost Republican83rd seat · the majority lineDistrict 720

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+10.2R+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 720.

Adults with a bachelor's degree36% 41st pct · 94th of 159 in NH

Lower than 59% of seats.

White adults without a degree54% 49th pct · 82nd of 159 in NH

Lower than 51% of seats.

Hispanic residents7% 85th pct · 24th of 159 in NH

Higher than 85% of seats.

Black residents2% 79th pct · 34th of 159 in NH

Higher than 79% of seats.

Asian residents0% 26th pct · 118th of 159 in NH

Lower than 74% of seats.

People per square mile444 57th pct · 69th of 159 in NH

Denser than 57% 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 714
38% college gradsR+14.5SplitDistrict 725
39% college gradsR+17.5SplitDistrict 703
41% college gradsR+17.7Held 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. Democratic (D)
    2027– · Won 2026 unopposed
  2. Republican (R)
    2027– · Won 2026 unopposed
  3. Robert D. Harb (R)
    2023–2027 · Won 2022 by 16.2, 2024 by 17.0
  4. James Summers (R)
    2023–2027 · Won 2022 by 10.2, 2024 by 10.3
  5. Charles R. Melvin Sr. (R)
    2023–2027 · Won 2022 by 13.3, 2024 by 15.1

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